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Solution :- (i) given that a=5 , d=3, an=50 we know nth term of an AP, an= a+(n-1)d =50=5+(n-1)3 =50-5=(n-1)3 =45=(n-1)3 =45/3=n-1 =15=n-1 =n=15+1 =n=16 Now,sum of n terms, Sn=n/2 [a+an] Sn=16/2 [5+50] sn=16/2 ×55 Sn=8×55=440 . (ii) given that,a=7,a13 =35 we know nth term of an AP, an =a+n-1 =a13=7+(13-1)d =35=7=12d =35-7=12d =28=12d =d=28/12=7/3 Now,sum of n terms Sn =n/2 [a+an] S13=13/2 [7+25] S13=13/2×42 S13=273. (iv) given that a3=15, S10 =125 we know, nth term of an AP, An=a+(n-1) = a3=a+(3-1)d--------------> (1) Sum of n terms Sn=n/2 [2a+(n-1)d] =S10=10/2 [2a+(10-1)d] =S10=5(2a+9d)-------------> (2) multiplying equ.(1) by (2) we get 30=2a+4d ----------> (3) Subtracting equ.(2) from equ (3) we get 2a+4d=30 2a+9d=25 (-) (-) _____________ -5d =5 d=___5__= -1 -5 subtracting the value of d in the equ (1)we get 15=a+2(-1) =15=a+2=a =15+2=a =a=17 Therefore a10 =a+(10-1)d a10=17+(10-1)(-1) a10=17+(10-1)(-1) a10=17+9×(-1) a10=17-9 a10=8 thus , d= -1 and a10=8 (v) given that, d=5, Sq=75 we know sum of n terms, Sn=n/2 [2a+(n-1)d] = Sq=9/2 [2a+(9-1)] =75=9/2 [2a+40] =75×2=9[2a+40] =150×18a+360 =18a=150-360 =18a= -210 =a= -210/18=-35/3 we know, an =a+(9-1)d a9=-35/3 +(9-1)5 a9= -35/3 +40 a9= -35+120/3 =85/3 thus a=-35/3 and a9=85/3 (vi) given a=2, d=8, Sn=90 we know,sum of n terms,Sn =n/2 [2a+(n-1)] =90=n/2 [2 (2)+(n-1)4] =90= n/2×2 [2+(n-1)4] =90=n [2+(4n-4] =90= n[4n-2] =90=4n^ - 2n =4n^-2n-90=0 =2n^-n-45=0 =2n^-10n+9n-45 (splitting the middle term) =2n(n-5)+9(n-5)=0 =(n-5)(Zn+9)=0 =n-5=0 we know nth term of an AP = an =an=2+(5-1)8 =an=2+2 4×8 =an= 2+32 =an=34 thus, n=5 and an=34 (viii) given that an=4,d=2, Sn=-14 we know nth term of an AP,an =an=a+(n-1)2 =4=a+2n-2 =6=a+2n =a=6-2n ------------>(1) we know sum of n terms Sn=n/2[2a+(n-1)] = -14=n/2×2[a+(n-1)] = -14=n[a+(n-1)] --------------> subtracting equ (1) in equ.(2) we get -14= [6-2n+n-1] = -14=n [5-n] = -14=5n-n2 =n2-5n-14=0 =n2-7n +2n-14=0 =n(n-7)+2 (n-7)=0 =(n-7)(n+2)=0 =n-7=0 =n=7 subtracting the value of'n' in the equ (1)we get =a=6-2(7) =a=6-14 =a= -8 thus n=7 and a= -8 (ix) given that a=3, n=8 and s=192 we know the sum of n terms of an AP Sn= n/2[a+an] =192=8/2 [3+an] =192=8/2[3+an] =192/4=[3+an] =192/4=3+an =48=3+an =an=48-3 =an=45 we know nth term of an AP an=a+(n-1)d =45=3+(8-1)d =45=7d =d=6 thus d=6

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Rearing of silkworm is called

Posted by Vikky Goyal 5 years, 3 months ago

CBSE > Class 10 > Social Science

3 answers

Vaishnavi Koppineedi 5 years, 3 months ago

Sericulture

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Rahul Kumar 5 years, 3 months ago

Sericulture

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Ritesh Jha 5 years, 3 months ago

Serticulture

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A boy went to a fair and stood in front of a mirror and found himself bigger in size than he went to other Mere and found in some smaller he was relieved when he went to other mirror and found in cell of same side but could be possible reason for this

Posted by Saksham Singla 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

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which are the sector will be more affected by the disaster . classify it into primary, secondary and tertiary sector. ( answer this question in 150-200 words) ??plz ?? help me?

Posted by Poonam Singh 5 years, 3 months ago

CBSE > Class 10 > Social Science

1 answers

Ritesh Jha 5 years, 3 months ago

Over the past century, employment in the primary and secondary sectors has declined in most rural areas, while the significance of the tertiary sector, or services, has become increasingly important. Today two-thirds to three-quarters of all jobs in rural areas are in the service sector. These structural changes in the economy have led geographers to initiate a sizable research program examining services. But, research on the topic is complicated by a number of factors, including issues surrounding the definition and classification of services. Additionally, in contrast to sectors like farming that are driven by external demand, the service sector in rural and urban areas has traditionally been reliant on local demand. As a result, the strategies and rationales for locating service establishments are quite different. Moreover, individual components of the service sector are quite different from each other (e.g., producer services vs. producer services), and the spatial impact of increasing or decreasing employment in one subsector as opposed to another will also be different. Finally, the role and nature of services in the rural economy varies tremendously from services in urban areas. These and a number of other issues are reviewed in the article.

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Give reason why copper is used to make hot water tanks and not steel ( an alloy of iron).

Posted by Kritika Kumari 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Kritika Kumari 5 years, 3 months ago

Thank you all friend

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Honey Jain 5 years, 3 months ago

Cu, Ag, Au and Pb this all are not react with any water.

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Honey Jain 5 years, 3 months ago

Copper does not react with hot water , cold water and steam water and Cu, Ag, Au and Pb

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Yogita Ingle 5 years, 3 months ago

Copper does not react with cold water, hot water or steam however iron reacts with steam. If water tanks are made of steel which is an iron alloy than iron would react with steam formed from hot water.

3Fe + 4H₂O →Fe₃O₄ + 4H₂

That is why copper is used to make hot water tanks and not steel.

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Sachit Jayaganesh 5 years, 3 months ago

Because iron will rust.

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Fill in the blanks: (i) A tangent to a circle intersects it in _______________ point(s). (ii) A line intersecting a circle in two points is called a _______________. (iii) A circle can have _______________ parallel tangents at the most. (iv) The common point of a tangent to a circle and the circle is called _________.

Posted by Krishan Aanand Patel 4 years, 8 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 4 years, 8 months ago

One point
Circle is the locus of points equidistant from a given point, the center of the circle, and nd Tangent is the line which intersect circle at one point only
Secant
A line which intersect circle in two points is called a chord if this line passes through center then it is called secant. (Points are A and B)
Two
As circle has infinite points, so there will be infinite tangents can be drawn on these points which touches at only one point. (P and Q)
So there will be infinite pairs of tangents which are parallel.
Point of Contact
The common point of a tangent to a circle and the circle is called point of contact. (P or Q in the given figure)

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In the reaction mno2 +4hcl gives mncl2+2h2o +cl2 Name the substance oxidized

Posted by Saniya Saniya 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Honey Jain 5 years, 3 months ago

4hcl gets oxidised

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Prachi Jain 5 years, 3 months ago

4hcl gets oxidised

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Satyam Swarnakar 5 years, 3 months ago

4hcl gets oxidised

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What is the division lemba

Posted by Noobi Master 5 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Rahul Yadav 5 years, 3 months ago

It is removed from shllybus

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What is meant by painting

Posted by A.J Styles 5 years, 3 months ago

CBSE > Class 10 > Painting

1 answers

A.J Styles 5 years, 3 months ago

Babababaj

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Why is the sky blue? The earth is surrounded by an atmosphere. ...

Posted by Shafin Ahmed 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

The molecules of air and other fine particles in the atmosphere have smaller size than the wavelength of visible light. These are more effective in scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end. The red light has a wavelength about 1.8 times greater than blue light. Thus, when sunlight passes through the atmosphere, the fine particles in air scatter the blue colour (shorter wavelengths) more strongly than red. The scattered blue light enters our eyes.

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(2)1/2*(12)1/2*(27)1/2*(5)1/2 divide by (8)1/2*(10)1/3*(18)1/2*(81)1/4

Posted by Tannu Raj 5 years, 3 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Write about the geographical distrubution culturw and religion of the Northeast

Posted by Anamika Jarambusa 5 years, 3 months ago

CBSE > Class 10 > Other Subjects

2 answers

Meghna Thapar 5 years, 3 months ago

Religion is an organized collection of beliefs, cultural systems, and world views that relate humanity to an order of existence. Many religions may have organized behaviors, clergy, a definition of what constitutes adherence or membership, holy places, and scriptures. Cultural geography is simply how the physical geography is going to impact the humans that live there. Cultural geography also compares various cultures and how their lifestyles and customs are affected by their geographical locations, climate, etc., as well as how they interact with their environment. Geography is a focus within the curriculum for understanding and resolving issues about the environment and sustainable development. It is also an important link between the natural and social sciences.

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Meghna Thapar 5 years, 3 months ago

Traditional cultural geographical approaches to the study of religion mainly seek to determine religion's impact on the landscape. Religious experiences and the belief in religious meanings transforms physical spaces into sacred spaces. The geography of religion examines the way in which religion is expressed on the Earth and its social, cultural, and environmental impacts.

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Describe the architectural styles of the temples in India?

Posted by Anamika Jarambusa 5 years, 3 months ago

CBSE > Class 10 > Other Subjects

1 answers

Yogita Ingle 5 years, 3 months ago

India has a rich culture and varied heritage which has been evolved from the Indus valley civilization. The Architecture holds the indigenous cultural traditions and social requirements, economic prosperity, the religious practice of different eras. Thus, the study of architecture discloses the cultural diversities of India. Most of the Indian art is encouraged by religion. Here we are giving the details about the Major style of Temple architecture.

The Gupta Age showed a new era in the history of temple architecture. Shilpashastras are the architectural texts written in early medieval times. These mention to 3 prominent styles of temple architecture. They are:

Nagara
Dravida
Vesara

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Explain the term 'Unity in Diversity'?

Posted by Anamika Jarambusa 5 years, 3 months ago

CBSE > Class 10 > Other Subjects

1 answers

Yogita Ingle 5 years, 3 months ago

Unity in diversity is a concept which signifies unity among individuals having certain differences in them. Nations like India, Nepal holds a strong example of this concept.
This very concept stimulates interaction between different types of individuals having certain differences among themselves at some point or other. It provides an opportunity of exposure while working with people coming from diverse socioeconomic or cultural background, in process enhancing the quality of teamwork following efficient cooperation and coordination.
It has connected business on global level by encouraging mutual respect among the people. This concept has allowed people of different religions, cultures, castes to leave peacefully.

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Write about the religion of the people during the indus valley civilization?

Posted by Anamika Jarambusa 5 years, 3 months ago

CBSE > Class 10 > Other Subjects

1 answers

Yogita Ingle 5 years, 3 months ago

Religious beliefs of the people of Indus Valley Civilisation:

Seals form an important source of information about the religious life of the Harappans. Apart from the discovery of fire altar from Kalibangan, no cult objects, temples or places of worship have been found.
From the seals which have been discovered , it has been concluded that religion during the Harappan times bore traces of later Hinduism as images of pashupati, goddess and sacred trees and animals have been discovered.
In one of the figures, a plant is shown as growing out of a woman’s body. Historians believe it to be Mother Earth, who was also worshipped in Middle East and Europe.
No place of worship such as temples were found in any of the cities of the Indus Valley Civilisation.

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Discuss the role of visual allegory for the rise of nationalism

Posted by Saloni Ghanshala 5 years, 3 months ago

CBSE > Class 10 > Social Science

1 answers

Yogita Ingle 5 years, 3 months ago

Marianne and Germania were respective female allegories for the French and the German nation. They stood as personifications of ideals like 'liberty' and 'the republic'. The importance of the way in which they were portrayed lay in the fact that the public could identify with their symbolic meaning, and this would instil a sense of national unity in them.

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Find the first 51 term of AP whose second and first term are 14 and 18

Posted by Siddharth Avhad 5 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Siddharth Avhad 5 years, 3 months ago

#ß$%&--JJ hu v C

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Siddharth Avhad 5 years, 3 months ago

#ß$%&--JJ hu v C

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If sin 0=cos 0than the value of tan 0+cot 0 is

Posted by Rishi Dixit 5 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Siddharth Avhad 5 years, 3 months ago

Giorgi

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We /shook/heat/with/not/hands/the should jumbled sentence

Posted by Neha Sharam 5 years, 3 months ago

CBSE > Class 10 > English Language and Literature

0 answers

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A current through a horizontal power line flows from south to North direction. The direction of magnetic field line 0.5m above it is

Posted by Md. Faizan Malkani 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

If p times pth is same as q times qth term and first term is Pq, then find the sum of (p+q)terms.

Posted by Sumona Mukherjee 5 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years, 3 months ago

p[a+(p−1)a]=q[a+(q−1)d]
ora(p−q)+(p2−q2)d+(q−p)d=0
ora(p−a)+(p+a)(p−q)−(p−q)d=0
ora+(p+q−1)d=0
This is the (p+q) th term.

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Write two properties of image formed by convex mirror

Posted by Bhavana Reddy 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Honey Jain 5 years, 3 months ago

The object and image are on opposite sides of mirror. Virtual , erect, smaller in size.

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Gaurav Seth 5 years, 3 months ago

Properties of the image formed by a convex mirror :

The image is always virtual and erect.
The image is highly diminished or point sized.
It is always formed between F and P.
The object and image are on opposite sides of mirror.

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Sawan Goja 5 years, 3 months ago

Virtual , erect, smaller in size

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Define virus name any two methods of protection against virus

Posted by Mehakdeep?? Kaur 5 years, 3 months ago

CBSE > Class 10 > Information Technology (402)

2 answers

Govind Singh Yadav 5 years, 3 months ago

Horse join we can protect I by antivirus

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Shivam Gond 5 years, 3 months ago

V=VITAL I=INPUT R=REPORT U=UNDER S=SIZE FOR PROTECTION use the antivirus or dont pur the pen drive which is used in other computer or pc

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Explain the unification of great Britain

Posted by Kaif Malik 5 years, 3 months ago

CBSE > Class 10 > Social Science

5 answers

Abhinav Kumar 2 years, 7 months ago

Introduction:- Historians consider UK unification as the best model of unification as in this unification, wars didn't occurred. Only some argument held between the states. It was result of a long drawn process. ____________________________Explanation:- The steps of unification are://// 1) The English parliament which has seized power from monarchy in 1688 was the instrument through which a nation state with England at its center came to be forged. → 2) The Act of union (1707) between England and Scotland that resulted in the formation of the 'United kingdom of Great Britain' meant, in effect, that England was able to impose its influence on Scotland as the English members were more in number in Parliament→ 3) Due to this, England dominated over Scotland on all aspects. Ireland also suffered a similar fate. → 4) After a failed revolt led by Wolfe Tone and his United Irishmen (1798), Ireland was forcibly incorporated into the United Kingdom in 1801. Thus, a new 'British nation' was forged through the propagation of a dominant English culture. __________________________________ NOTE:- The symbols of new Britain–the British flag(Union Jack), the national anthem (God save our Noble King), the English language–were actively promoted and the older nations survived only as subordinate partners in this union.

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Abhinav Kumar 2 years, 7 months ago

Introduction:- Historians consider UK unification as the best model of unification as in this unification, wars didn't occurred. Only some argument held between the states. It was result of a long drawn process. ________________________________ __________Explanation:- The steps of unification are://// 1) The English parliament which has seized power from monarchy in 1688 was the instrument through which a nation state with England at its center came to be forged. → 2) The Act of union (1707) between England and Scotland that resulted in the formation of the 'United kingdom of Great Britain' meant, in effect, that England was able to impose its influence on Scotland as the English members were more in number in Parliament→ 3) Due to this, England dominated over Scotland on all aspects. Ireland also suffered a similar fate. → 4) After a failed revolt led by Wolfe Tone and his United Irishmen (1798), Ireland was forcibly incorporated into the United Kingdom in 1801. Thus, a new 'British nation' was forged through the propagation of a dominant English culture. __________________________________ NOTE:- The symbols of new Britain–the British flag(Union Jack), the national anthem (God save our Noble King), the English language–were actively promoted and the older nations survived only as subordinate partners in this union.

1Thank You

Abhinav Kumar 2 years, 7 months ago

Introduction:- Historians consider UK unification as the best model of unification as in this unification, wars didn't occurred. Only some argument held between the states. It was result of a long drawn process. ________________________________ Explanation:- The steps of unification are://// 1) The English parliament which has seized power from monarchy in 1688 was the instrument through which a nation state with England at its center came to be forged. → 2) The Act of union (1707) between England and Scotland that resulted in the formation of the 'United kingdom of Great Britain' meant, in effect, that England was able to impose its influence on Scotland as the English members were more in number in Parliament→ 3) Due to this, England dominated over Scotland on all aspects. Ireland also suffered a similar fate. → 4) After a failed revolt led by Wolfe Tone and his United Irishmen (1798), Ireland was forcibly incorporated into the United Kingdom in 1801. Thus, a new 'British nation' was forged through the propagation of a dominant English culture. ________________________________ NOTE:- The symbols of new Britain–the British flag(Union Jack), the national anthem (God save our Noble King), the English language–were actively promoted and the older nations survived only as subordinate partners in this union.

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Gaurav Seth 5 years, 3 months ago

Unification of Britain:

(i) Britain was not a nation state prior to 18th century. The primary identities were based on ethnicity such as English, Welsh, Scot or Irish.

(ii) The steady growth of power made the English nation extend its influence over the other nations and islands.

(iii) In 1688, England established as a nation state. English parliament seized power from the monarchy.

(iv) In 1707, the United Kingdom of Great Britain formed with the Act of the Union between England and Scotland.

(v) England dominated Scotland and Ireland in all spheres. British Parliament was dominated by English members.

(vi) Ireland was forcibly taken by the British after the failed revolution led by Wolfe and his United Irishmen (1798) and a new "British Nation" was formed.

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Sawan Goja 5 years, 3 months ago

In Britain, the formation of a nation-state was not the result of a sudden upheaval, revolution or national struggle but of a long drawn out parliamentary process. The process of unification of Britain is as follows: 1 Britain was not a nation-state prior to 18th century. England had people of many ethnic groups such as English, Welsh, Scot and Irish with their own cultural and political traditions. 2 The English nation steadily grew in importance, wealth and power and extended her influence over other nations of the island. 3 In 1688, England established as a nation-state. English parliament seized power from the monarchy. 4 In 1707 the Act of Union between England and Scotland led to the formation of the ‘United Kingdom of Great Britain’. 5 England dominated Scotland and Ireland in all spheres. British Parliament was dominated by English members. 6 Ireland was forcibly taken by the British after the failed revolution led by Wolfe and his United Irishmen (1798) and a new "British Nation" was formed.

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Sarkari Tantra Mein George Pancham ki naak Lagane ko Lekar Jo Chinta Hai Badha Vashi Dikhai Deti Hai vah Unki Kis mansikta Ko darshati Hai

Posted by Kiyara Rajput 5 years, 3 months ago

CBSE > Class 10 > हिंदी ए

0 answers

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p[a+(p−1)a]=q[a+(q−1)d]
ora(p−q)+(p2−q2)d+(q−p)d=0
ora(p−a)+(p+a)(p−q)−(p−q)d=0
ora+(p+q−1)d=0
This is the (p+q) th term.

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p[a+(p−1)a]=q[a+(q−1)d] ora(p−q)+(p2−q2)d+(q−p)d=0 ora(p−a)+(p+a)(p−q)−(p−q)d=0 ora+(p+q−1)d=0 This is the (p+q) th term.

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p[a+(p−1)a]=q[a+(q−1)d]
ora(p−q)+(p2−q2)d+(q−p)d=0
ora(p−a)+(p+a)(p−q)−(p−q)d=0
ora+(p+q−1)d=0
This is the (p+q) th term.