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ANSWER

How many terms are there in the AP 41,38,35,...,8?

Posted by Soumya Kumari 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 5 years, 4 months ago

An= a + (n-1)d

where, a= 41 and d = a2 -a1=38-41=-3

now, 8 = 41 + (n-1)-3

8-41=-3n+3

-33 = -3n+3

-33-3 =-3n

-36=-3n

n =12

Answer: 12 terms.

Yogita Ingle 5 years, 4 months ago

A_n= a + (n-1)d

where, a= 41 and d = a₂ -a₁=38-41=-3

now, 8 = 41 + (n-1)-3

8-41=-3n+3

-33 = -3n+3

-33-3 =-3n

-36=-3n

n =12

therefore there are 12 terms.

ANSWER

√2+√5 is irrational prove that

Posted by Amal Manoj 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

Let us assume that √2+√5 is a rational number.

A rational number can be written in the form of p/q where p,q are integers and q≠0

√2+√5 = p/q

On squaring both sides we get,

(√2+√5)² = (p/q)²

√2²+√5²+2(√5)(√2) = p²/q²

2+5+2√10 = p²/q²

7+2√10 = p²/q²

2√10 = p²/q² – 7

√10 = (p²-7q²)/2q

p,q are integers then (p²-7q²)/2q is a rational number.

Then √10 is also a rational number.

But this contradicts the fact that √10 is an irrational number.

Our assumption is incorrect

√2+√5 is an irrational number.

Hence proved.

ANSWER

If alfa nd bita are zeros of x²-5x+6 evalute alfa⁴ - bitta⁴

Posted by Prabina Rani Sethy 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

The polynomial is,

Step-by-step explanation:

If and are the roots of a quadratic equation,

Then the quadratic equation is,

Here, the given quadratic equation is,

Which having the zeroes, and .

For finding the zeroes,

Thus, the zeroes of the given quadratic equation are 2 and 3,

(2)⁴ - (3)⁴

^{16 - 81}

^{= -65}

ANSWER

What is important points in ch.5 before starting 5.1 ex

Posted by Tamanna Bhabhor 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Arpita Singh 5 years, 4 months ago

Understanding AP

Neeraj Singh 5 years, 4 months ago

Bhai tu question paper hi mang le

ANSWER

Math cbse now solutions

Posted by Bhupinder Singh Brar 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Arpita Singh 5 years, 4 months ago

Bhai we r not ur Google or elexa?

ANSWER

Ontain all the zero of p(x)2x4+x3-14x2-19x-6 if two of its zeroes are -2 and -1

Posted by Amrith Sagar 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

5. A person invested some amount at the rate of 12 per cent simple interest and a amount at the rate of 10 per cent simple interest. He received yearly interest of 134 if he had interchanged the amounts invested, he would have received 4 less as interest How much amount did he invest at different rates?

Posted by Nikita Sharma 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

88888888+8888888

Posted by Ravi Yadav 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

.. .... 5 years, 4 months ago

97777776

ANSWER

How many terms of AP 17 15 13 11 must be added to get some 72 ?explain that answer

Posted by Praveen Kumar Mahto 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

We are given a = 17, d = -2, S_n = 72 and we have to find n.
Using S_n = n[2a +(n -1)d]/2, we get
72 = n[2.17 +(n -1)(-2)]/2 = n(36 -2n)/2 = n(18 -n)
=> n² -18n +72 = 0 => (n -6)(n -12) = 0
=> n = 6, 12
Both values of n, being positive integers are valid. We get double answer because sum of 7th to 12th terms is zero, as some terms are positive and some are negative.

ANSWER

Which term of AP:121,117,113....... is its first negative term?

Posted by Khushi Chaurasia 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

a = 121

d = -4

let an= 0

then

an = a + (n-1)d

=> 0 = 121 + (n-1)(-4)

=> 0 = 121 - 4n + 4

=> 4n = 125

=> n = 125/4

=> n = 31.25

as n must be natural number then n= 32

32nd term is First negative number.

a32 = 121 + (31)-4

= 121 - 124 = -3

ANSWER

Find the value of cos145

Posted by Rekha Tiwari 5 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Rekha Tiwari 5 years, 4 months ago

which one of the following does not belong to the territory sector

Rekha Tiwari 5 years, 4 months ago

Which one of the following is not an activity of primary sector

Yogita Ingle 5 years, 4 months ago

On the trig unit circle, arc 145 is in Quadrant II
cos 145 = - cos (35)
Calculator gives -> cos 35 = 0.82

Therefor, cos 145 = - 0.82.

ANSWER

Exercise 3.3 quition no. 3

Posted by Prachi Mishra 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

200x +400y =1 How is this possible

Posted by Ujjwal Kumar 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Swastik Kumar Tripathy 5 years, 4 months ago

It can be possible when x=-399/200 and y=1 and many more solutions...

ANSWER

If 13 sin A=5 find 325 sinA - 130 cosA - 12 tan A

Posted by Manish Lahoti 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Dhruv Jain 5 years, 4 months ago

If sin A=5/13 P=5cm H=13cm B=12cm Cos A=12/13 Tan A= 5/12 325 sinA-130 cosA- 12 tanA Now you can put value and find the exact answer

ANSWER

Hcf &lcm of 2no is 9 & 459 respectivly if one no is 27find the another no

Posted by Sapan Prusty 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Dhruv Jain 5 years, 4 months ago

As we know LCM(a,b)×HCF(a,b)=a×b 9×459=27×b b=9×459/27 b= 459/3=153 Other number is 153.

ANSWER

2x+3y-2x-2y=+4+5

Posted by Hoshiyar Singh 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Koushik Ch 5 years, 4 months ago

Since x=0 as 2x and -2x subtracted

Koushik Ch 5 years, 4 months ago

y=9

ANSWER

How do solve quadratic polynomial

Posted by Mitali Kanojia 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Dhruv Jain 5 years, 4 months ago

There are 3 ways. 1) middle term split 2) completing the squares 3) quadratic formula

Tanishka Bandishte 5 years, 4 months ago

By factorisation of the middle term

ANSWER

find all zero of the polynomial f(×)=2x4 - 2x3- 7x2 + 3x +6 if its two zeros are -3/2 root and 3/2 root

Posted by Vinayak Kumar 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

two dice are rolled. What are the possible outcomes

Posted by Mahesh.N N 5 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Dhruv Jain 5 years, 4 months ago

There are total 36 possible outcomes (1,1)(1,2)(1,3)(1,4)(1,5)(1,6) (2,1)(2,2)(2,3)(2,4)(2,5)(2,6) (3,1)(3,2)(3,3)(3,4)(3,5)(3,6) (4,1)(4,2)(4,3)(4,4)(4,5)(4,6) (5,1)(5,2)(5,3)(5,4)(5,5)(5,6) (6,1)(6,2)(6,3)(6,4)(6,5)(6,6) Note that there are 36 possibilities for (a,b). This total number of possibilities can be obtained from the multiplication

Tanishka Bandishte 5 years, 4 months ago

Yogita Ingle 5 years, 4 months ago

Probability for rolling two dice with the six sided dots such as 1, 2, 3, 4, 5 and 6 dots in each die.

ANSWER

2+45

Posted by Ayushi Singh 5 years, 4 months ago

CBSE > Class 10 > Mathematics

4 answers

Nisha???????? Bharti 5 years, 4 months ago

But ye class 10 ka question nahi

Nisha???????? Bharti 5 years, 4 months ago

Vaibhav (Silent Love)?? Avi 270505??? 5 years, 4 months ago

Ayushi Singh 5 years, 4 months ago

ANSWER

Find the value of a so that point (3,a) lies on the line represented by 2x-3y+5=0

Posted by Yugant Moon 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

2x-3y+5=0

Put x = 3 and y= a

2(3) -3a+5=0

6 - 3a + 5 = 0

11 - 3a =0

3a = 11

a = 11/3

ANSWER

Find the quadratic polynomial, sum and product of whose zeros are -1 and -20 respectively also find the zeros of the polynomial so obtained

Posted by Jincy Joseph 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Pakhi Arora 5 years, 4 months ago

x2+x-20

ANSWER

Definition of zero of a polynomial P(x)

Posted by Anshul Kandpal 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Ishita Khadpe 5 years, 4 months ago

Zeros of a polynomial can be defined as the points where the polynomial becomes zero on the whole. A polynomial having value zero (0) is called zero polynomial. The degree of a polynomial is the highest power of the variable x.

ANSWER

What is the formula of eqalid lemma

Posted by Š&Ãś&Wàť Khäřë 5 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Arpita Singh 5 years, 4 months ago

a=bq+r

Gaurav Seth 5 years, 4 months ago

According to Euclid’s Division Lemma if we have two positive integers a and b, then there exist unique integers q and r which satisfies the condition a = bq + r where 0 ≤ r ≤ b.

Gaurav Seth 5 years, 4 months ago

Theorem (Euclid’s Division Lemma):

For a pair of given positive integers ‘a’ and ‘b’, there exist unique integers ‘q’ and ‘r’ such that

a=bq+ra=bq+r, where 0≤r<b0≤r<b

Explanation:

Thus, for any pair of two positive integers a and b; the relation

a=bq+ra=bq+r, where 0≤r<b0≤r<b

will be true where q is some integer.

<hr />

Example:

(a) 20, 8

Let 20 = a and 8 = b

Therefore, by applying the relation a=bq+ra=bq+r, where 0≤r<b0≤r<b we get 20=8×2+420=8×2+4 (In this q=2q=2 and r=4r=4)

ANSWER

How will we get to know if we need to subtract or add the equation in elimination method?

Posted by Samruddhi Br 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Meghna Thapar 5 years, 4 months ago

The elimination method of solving systems of equations is also called the addition method. To solve a system of equations by elimination we transform the system such that one variable "cancels out". ... In order to solve for y, take the value for x and substitute it back into either one of the original equations. In the elimination method you either add or subtract the equations to get an equation in one variable. When the coefficients of one variable are opposites you add the equations to eliminate a variable and when the coefficients of one variable are equal you subtract the equations to eliminate a variable.

ANSWER

Zeroes of p(x)=7x+3 is

Posted by Igam Basar 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Arav Singh 5 years, 4 months ago

Its a linear equation..So there will be only one zero that is -3/7

Drift? Boi? 5 years, 4 months ago

-3/7

3Thank You

ANSWER

What is the difference between Euclids division algorithm and Euclids division lemma

Posted by Durgacharan Sahu 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Lucifer?? Morningstar?? 5 years, 4 months ago

Lemma is a proven statement used for proving another statement while algorithm is a series of well defined steps which gives a procedure for solving a type of a problem.

ANSWER

√1\6√1\6√1\6… prove that it is a quadratic equation

Posted by Tanishq Rai 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Arav Singh 5 years, 4 months ago

Can you rewrite the question?

ANSWER

proove that root 2 is a irrational number

Posted by Surya Gantla 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Ishita Khadpe 5 years, 4 months ago

Let √2 be a rational number Therefore, √2= p/q [ p and q are in their least terms i.e., HCF of (p,q)=1 and q ≠ 0 On squaring both sides, we get p²= 2q² ...(1) Clearly, 2 is a factor of 2q² ⇒ 2 is a factor of p² [since, 2q²=p²] ⇒ 2 is a factor of p Let p =2 m for all m ( where m is a positive integer) Squaring both sides, we get p²= 4 m² ...(2) From (1) and (2), we get 2q² = 4m² ⇒ q²= 2m² Clearly, 2 is a factor of 2m² ⇒ 2 is a factor of q² [since, q² = 2m²] ⇒ 2 is a factor of q Thus, we see that both p and q have common factor 2 which is a contradiction that H.C.F. of (p,q)= 1 Therefore, Our supposition is wrong Hence √2 is not a rational number i.e., irrational number. Read more on Brainly.in - https://brainly.in/question/2367037#readmore