Arithmetic Progression Ex 9.2

Which term of the sequence 4, 9, 14, ... is 124?

• 25

• 24

• 26

• 23

If m times the mth term of an A.P is equal to n times its nth term, then the (m + n)th term is

• mn

• m + n

• 1

• 0

If the sum of n terms of an A.P be  $3n^2-n$  and its common difference is 6, then its first term is

• 1

• 2

• 3

• 4

If the sum of n terms of an A.P, is  $3n^2+5n$  then which of its terms is 164?

• 26th

• 27th

• 28th

• none of these.

If the first, second and last term of an AP are a, b, and 2a respectively, then its sum is

• $\frac{ab}{2\left(b-a\right)}$

• $\frac{ab}{b-a}$

• $\frac{3ab}{2\left(b-a\right)}$

• none of these

The first and last terms of an A.P are 1 and 11. If the sum of its terms is 36, then the number of terms will be

• 5

• 6

• 7

• 8

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

• 4

• 5

• 6

• 7

The 10th and 18th terms of an A.P are 41 and 73 respectively, then 26th term is

• 105

• 104

• 106

• 107