Question

Write the first three terms of the sequence whose nth term is given by the following expression and mention whether it is an AP or not.n^2-1 where n is a natural number .

Answer 1

Answer:

3, 8, 15

Step-by-step explanation:

First we define a natural  number. These are numbers ranging from 1 on wards.

So we cannot do 1 sq because one sq will equal to one and if you subtract one will give you zero which is not a natural number. For this reason we go to  2.

1. n=2

2^2-1

4-1

3

2.n=3

3^2 -1

9-1

8