Q3 of 176 Page 8

Find the 10th term of the A.P.

Given:

Here,

and n = 10

We have,

t_n = a + (n – 1)d

Therefore, the 10^th term of the given AP is

Find the indicated terms in each of the following arithmetic progression:

a = 21, d = — 5; t_n, t₂₅

Find the 10th term of the A.P. 10, 5, 0, — 5, — 10, ...

Find the sum of 20th and 25th terms of A.P. 2, 5, 8, 11, ...

Find the number of terms in the following A.P.'s

6, 3, 0, — 3,…..,–36