Q1 of 167 Page 19

Find:
18^th term of the A.P.

A.P is known for Arithmetic Progression whose common difference = a_n – a_n-1 where n > 0

Common difference, d

To find 18^th term of A.P, firstly find a_n

We know, a_n = a + (n-1) d where a is a first term or a₁ and d is common difference

When n = 18:

Hence, 18th term of A.P. is 34√2

The n^th term of a sequence is given by a_n = 2n² + n+ 1. Show that it is not an A.P.

Find:

10^th term of the A.P. 1, 4, 7,10,.....

Find:

nth term of the A.P. 13, 8, 3, -2,……

In an A.P., show that a_m+n + a_m–n = 2a_m.

Find:18th term of the A.P.