## If Sn denote the sum of n terms of an A.P..

If $\mathbf{S}_{\mathbf{n}}$ denote the sum of n terms of an A.P. with first term a and common difference d such that $\frac{S_{x}}{S_{k x}}$ is independent of x, then A. d…

## The 9th term of an A.P. is 449..

The 9th term of an A.P. is 449 and 449th term is 9. The term which is equal to zero is A. 50th B. 502th C. 508th D. None of…

## In an AP, Sp = q, Sq = p and S denotes..

In an AP, $S_{p}=q, S_{q}=p$ and S denotes the sum of first r terms. Then, $\mathrm{S}_{\mathrm{p}+\mathrm{q}}$ is equal to A. 0 B. – (p + q) C. p + q…

## If the sum of first n even natural number is..

If the sum of first n even natural number is equal to k times the sum of first n odd natural numbers, then k = A. $\frac{1}{n}$ B. $\frac{n-1}{n}$ C.…

## If the sum of it terms of an A.P. is..

If the sum of it terms of an A.P. is 2$\mathbf{n}^{2}$ + 5n, then its nth term is A. 4n - 3 B. 3n - 4 C. 4n + 3…

## If 7th and 13th terms of an A.P. be 34..

If 7th and 13th terms of an A.P. be 34 and 64 respectively, then its 18th term is A. 87 B. 88 C. 89 D. 90 Answer: Option C Show…

## The first three terms of an A.P.

The first three terms of an A.P. respectively are 3y – 1, 3y + 5 and 5y + 1. Then, y equals A. -3 B. 4 C. 5 D. 2…

## The common difference of the A.P. is..

The common difference of the A.P. is $\frac{1}{2 q}, \frac{1-2 q}{2 q}, \frac{1-4 q}{2 q}$.....is? A. -1 B. 1 C. q D. 2q Answer: Option A Show Answer Solution(By Apex…

## If frac 5 + 9 + 13 + text to n…

If $\frac{5+9+13+\ldots \text { to } n \text { terms }}{7+9+11+\ldots \text { to }(n+1) \text { terms }}=\frac{17}{16}$, then n = ? A. 8 B. 7 C. 10 D.…

## If the first term of an A.P. is a…

If the first term of an A.P. is a and nth term is b, then its common difference is A. $\frac{b-a}{n+1}$ B. $\frac{b-a}{n-1}$ C. $\frac{b-a}{n}$ D. $\frac{b+a}{n-1}$ Answer: Option B…