English Medium कक्षा १० - CBSE Question Bank Solutions for Mathematics

If the zeros of the polynomial f(x) = x³ − 12x² + 39x + k are in A.P., find the value of k.

If (m + 1)^th term of an A.P is twice the (n + 1)^th term, prove that (3m + 1)^th term is twice the (m + n + 1)^th term.

If the nth term of the A.P. 9, 7, 5, ... is same as the nth term of the A.P. 15, 12, 9, ... find n.

Find the 12^th term from the end of the following arithmetic progressions:

3, 5, 7, 9, ... 201

The sum of three terms of an A.P. is 21 and the product of the first and the third terms exceed the second term by 6, find three terms.

Three numbers are in A.P. If the sum of these numbers is 27 and the product 648, find the numbers.

Find the four numbers in A.P., whose sum is 50 and in which the greatest number is 4 times the least.

Find the sum of the following arithmetic progressions: 50, 46, 42, ... to 10 terms

Find the sum of the following arithmetic progressions:

1, 3, 5, 7, ... to 12 terms

Find the sum of the following arithmetic progressions:

3, 9/2, 6, 15/2, ... to 25 terms

Find the sum of the following arithmetic progressions:

41, 36, 31, ... to 12 terms

Find the sum of the following arithmetic progressions:

a + b, a − b, a − 3b, ... to 22 terms

Find the sum of the following arithmetic progressions 

`(x - y)^2,(x^2 + y^2), (x + y)^2,.... to n term`

Find the sum of the following arithmetic progressions:

`(x - y)/(x + y),(3x - 2y)/(x + y), (5x - 3y)/(x + y)`,  .....to n terms

Find the sum of the following arithmetic progressions:

−26, −24, −22, …. to 36 terms

Find the sum to n term of the A.P. 5, 2, −1, −4, −7, ...,

Find the sum of n terms of an A.P. whose nth terms is given by a_n = 5 − 6n.

Find the sum of the first 25 terms of an A.P. whose nth term is given by a_n = 7 − 3n

How many terms are there in the A.P. whose first and fifth terms are −14 and 2 respectively and the sum of the terms is 40?

How many terms of the A.P. 63, 60, 57, ... must be taken so that their sum is 693?