Question

Write first four terms of the following sequence a n=n^2-1

Answer 1

hey mate hope it helps you.

the sequence is 0, 3, 8 , 15....

Answer 2

Solution :-

[here nth term is already

Given as -

an = n² - 1

So , a1 = 1^{2} - 1 = 1 - 1 = 0

a2 = 2^{2} - 1 = 4 - 1 = 3

a3 = 3^{2} - 1 = 9 - 1 - = 8

a4 = 4^{2} - 1 = 16 - 1 = 15

Therefore ,

0 , 3 , 8 , 15 are the first four

terms .