CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Is the sum of n positive integers formula, n(n+1)2n(n+1)2, applicable to sets of consecutive integers as well? For instance, if I wanted to calculate sum of first 20 multiples of 3, could I use: 3 x 20(21)220(21)2 a similar approach has been used for even numbers.

1Thank You

Rashi Vashist??❤ 6 years, 10 months ago

1+2+3+4.........infinity =-1/12 So the sum of all the integer is -1/12

2Thank You

Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

n(n+1)/2

1Thank You

ANSWER

What is the sum of all even numbers

Posted by Raj Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Raj Singh 6 years, 10 months ago

Sum of all even numbers is -1/6

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Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

n(n+1)/2

2Thank You

ANSWER

What is the sum of all odd numbers

Posted by Raj Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Raj Singh 6 years, 10 months ago

Sum of all odd numbers is 1/12

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Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

n×n or n square .

1Thank You

ANSWER

What is the sum all natural numbers

Posted by Raj Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Raj Singh 6 years, 10 months ago

Sum of all natural numbers is -1/12

0Thank You

Soumitra Agrawal 6 years, 10 months ago

-1/12

0Thank You

Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

Sn =n/2 (n+1) eg:- 100/2 (100+1)= 50×101=5050

1Thank You

ANSWER

Euclid division lemma (a=bq+r)

Posted by Sohan Khan 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Sohan Khan 6 years, 10 months ago

I didn't understood anything

0Thank You

Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

Yes u r right

3Thank You

ANSWER

SinΦ(1+tanΦ)+cosΦ(1+cotΦ)= secΦ+cosecΦ

Posted by Samriddhi Shrivastava 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

(p-3)x+3y=p, px+py=12 what value of p

Posted by Aman Saini 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Neha Sirur 6 years, 10 months ago

P=6

0Thank You

ANSWER

Tan(3x-15)=1 value of x

Posted by Aman Saini 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 6 years, 10 months ago

Tan (3x-15°) =1
Tan(3x-15°) =tan 45°
So, on comparing
3x-15°=45°
3x=60°
X=20°

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ANSWER

Given that LCM (150,100)=300,find HCF(150,100)

Posted by Bijay Sharma 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 6 years, 10 months ago

lcm * hcf = product of two numbers

as per question

300 * hcf = 150 * 100

hcf = 15000/300

hcf = 50

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ANSWER

An iron ball of 5cm diameter is thrown into a cubical container of 15cm edge and half filled with water. Find the volume remained unfilled and the raise in water level.

Posted by Kavin Bansal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

X²-2x-8= 0

Posted by Chintu Gupta 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 6 years, 10 months ago

x2 - 2x - 8 = 0
x2 - 4x + 2x - 8 = 0
x(x -4) + 2 ( x-4) = 0
(x + 2) (x -4) = 0
x + 2 = 0 or x - 4 = 0
x = -2 or x = 4

0Thank You

Aman Saini 6 years, 10 months ago

Your answer =2

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ANSWER

Find the value of a so that the points {3,a}lies on the line represented by 2x-3y=5

Posted by Sinchana B. Raj Sinchana B. Raj 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 6 years, 10 months ago

x = 3 and y = a
2x - 3y = 5
2(3) - 3(a) = 5
6 - 3a = 5
3a = 6 - 5
3a = 1
a = 1/3

0Thank You

Aman Saini 6 years, 10 months ago

1/3=a

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ANSWER

In wahr ratio does the point (-4,6) divide tye line segment joining the points A(-6,10) and B(3,-8)?

Posted by Vansh Pipara 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

7:2

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ANSWER

A card is drawn random from a pack of 52 cards find the probability that the card is drawn black and the king

Posted by Abhay Mishra 6 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

Aayush Thakkar 6 years, 10 months ago

7/13

0Thank You

Aman Saini 6 years, 10 months ago

1/26

0Thank You

Dipti Singh 6 years, 10 months ago

28/52

2Thank You

Raghav Hr 81 Alla Bhaman 6 years, 10 months ago

24/52

1Thank You

ANSWER

Who discovers the mathematic

Posted by Satyam Dongre 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Saurabh Rajput 6 years, 10 months ago

Pythagora

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ANSWER

What is the difference between division algorithm and the fundamental theorem of arithmetic???

Posted by Akshi Kaushik 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If x=a and y=b

Posted by Siddarth Shakya 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Example 13 to solve

Posted by Shreyas Shivakumarswamy 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Music_ Lover?? 6 years, 11 months ago

Frm which ch?

0Thank You

Anshika & Aliens???? 6 years, 11 months ago

Which chapter

0Thank You

ANSWER

586%

Posted by Dinesh Singh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Music_ Lover?? 6 years, 11 months ago

Plz write full question

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ANSWER

Please give me some tips for improving maths .....I don't know why I becomes nervous at the time of exam of maths please help so that I will do well for boards without any nervousness.....

Posted by Keep Calm Stay Away ??? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Honey ??? 6 years, 11 months ago

Practice practice practice practice practice practice and only practice bus aage teacher pe rehne do

1Thank You

Music_ Lover?? 6 years, 11 months ago

It happens wid almost everyone Akansha...but stay calm , and positive in whatever u do...and practice hard....u will surely do well..??

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ANSWER

Use Euclid algorithm to find hcf of 1190 and 1445 express the hcf in the form of 1190m +1445n

Posted by Puneet Singh 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Here we have to find HCF of 1190 and 1445 and express the HCF in the form 1190m + 1445n.
1445 = 1190 × 1 + 255
1190 = 255 × 4 + 170
255 = 170 × 1 + 85
170 = 85 × 2 + 0
So, now the remainder is 0, then HCF is 85
Now,
85 = 255 - 170
= (1445 - 1190) - (1190 - 255 × 4)
= 1445 - 1190 - 1190 + 255 × 4
= 1445 - 1190 × 2 + (1445 - 1190) × 4
= 1445 - 1190 × 2 + 1445 × 4 - 1190 × 4
= 1445 × 5 - 1190 × 6
= 1190 × (- 6) + 1445 × 5
= 1190m + 1445n , where m = - 6 and n = 5

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ANSWER

Find the median of given data:-5,11,8,7,9,12,19 SOLVE BY DOING ALL THE STEPS

Posted by Gourishankar Patel 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Gourishankar Patel 6 years, 10 months ago

Frequency not required in the given question We have to make it according to the odd and even formula

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ANSWER

If mth term of an A.p. is 1/n and nth term is 1/m , show the sum of its first (mn) term is 1/2(mn+1)

Posted by Hema Pandey 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Ahere Kashinath 6 years, 10 months ago

By solving am=1/n we get equation i.e.,a+dm-d=1/n. Similarly solving an=1/m we get equation i.e.,a+dn-d=1/m. By eliminating these two equations we d=1/mn. Substitute this value of d in equation 1 . We get a=1/mn. Then find Amn,we Amn=1. By this find Smn i.e., Smn=mn/2{a+Amn} we get 1/2{mn+1]. Hence proved....

1Thank You

Aryan Khare 6 years, 11 months ago

I/n=a+(m-1)d......1/m=a+(n-1)d.........subtract......1/n-1/m=a-a+(m-1-n+1)d..........(m-n)/mn=(m-n)d.......d=1/mn......put the value of d in eq (1) you get a=1/mn.......now put the formulae of sn.......mn/2[(2/mn+(mn-1)1/mn]........mn/2(2+mn-1)1/mn....then we get sn=1/2(mn+1)

1Thank You

Aryan Khare 6 years, 11 months ago

Question galat h aapka

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ANSWER

If the ratio of the sum of the first n terns of two A.Ps is (7n+1):(4n+27),then find the ratio of their 9th terms

Posted by Aniket Anand 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Riya Pal 6 years, 11 months ago

May be 24:19...is it correct????

0Thank You

Anshika & Aliens???? 6 years, 11 months ago

I think so 64:53 am i right ?

1Thank You

ANSWER

If a point A(4,3)B(x,5) are on a circle with center O(2,3) Find x

Posted by Chandra Naveen 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Ram Kushwah 6 years, 11 months ago

A and B are on circle

so OA=OB=r

OA^2=OB^2

(4-2)^2 +(3-3)^2=(x-2)^2+(5-3)^2

or 4+0=(x-2)^2+4

(x-2)^2=0

x-2=0

x=2

0Thank You

Gaurav Seth 6 years, 11 months ago

Given centre of circle is O(2, 3) Points on the circle are A(4, 3) and B(x, 5) OA =OB (Radii) à (1) Recall the distance between two points formula Squaring on both the sides, we get

x – 2 = 0

∴ x = 2

0Thank You

Aryan Khare 6 years, 11 months ago

What is A and B radius,diametre or cord

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ANSWER

If the diametre of a circle is increased by40% what is the increase area of the circle Ans. 96%

Posted by Avaneesh Sharma Mdjssv 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 6 years, 11 months ago

The area of a circle is determined by the formula (pi)r².
The best way for you to approach this problem is by using a sample diameter. Let's use 4, since it's easy.
1: Multiply 4 by 0.40= 1.6. So your new diameter is 5.6.
2: Divide the diameter by two to get the radius => 2.8.
3: Square the radius => 7.84. Now multiply by pi, using 3.14 ==> 24.62.
4: Find the original area of the circle ==> 2²*3.14 ==> 12.56.
5: 24.62/12.56=1.96 ==> The new is 196% of the original, so the area changes by 96%.

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ANSWER

Explain upstream and downstream i have many doubt in this question

Posted by Aryan Khare 5 years, 8 months ago

CBSE > Class 10 > Mathematics

5 answers

Sneha Singh 6 years, 11 months ago

When it goes in the direction of flow of river means downstream then we have to add (x+y) and if goes opposite to the direction of flow of river means upstream then we will subtract (x-y)

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Ram Kushwah 6 years, 11 months ago

If any boat is moving in direction of river flow is known as DOWNSTREAM and

moving opposite to river flow is UPSTREAM.

0Thank You

Vishal Kumar 6 years, 11 months ago

Downstream=x+y and upstream =x-y

1Thank You

Anushka Jugran ? 6 years, 11 months ago

It's easy yrr.. Just remember that downstream me speed add hoti hai and upstream me subtract

0Thank You

Aryan Khare 6 years, 11 months ago

Sorry i want to say in this concept

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ANSWER

The height of a cone is 30 cm. From its topside a small cone is cut by a plane parallel to its base. If volume of smaller cone is 1/27 of the given cone, then at what height it is cut from its base ?

Posted by Suraj Santhosh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 6 years, 11 months ago

Given height of the cone = 30 cm Let the small cone is cut off at a height ‘h’ from the topLet the radius of big cone be r1 and small cone be r2. Volume of the big cone, From the figure, ΔACD ~ ΔAOB [AA similarity criterion] Thus at a height 20 cm above the base a small cone is cut

0Thank You

Anushka Jugran ? 6 years, 11 months ago

Answer is 20 cm.

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ANSWER

Find the coordinates of the point on y-axis which is nearest to the point(-2, 5)

Posted by Chaithanya R 6 years, 11 months ago

CBSE > Class 10 > Mathematics