Question

What is the nth term of the AP a , 3a , 5a , ... ?

Answer 1

Answer:

Given AP is a , 3a , 5a , ...

First term is a and d = 3a a − = 2a

nth term an = a n + − ( )1 d

= a n + − ( )1 2a

= a na a + − 2 2

= 2na − a = ( ) 2 1 n a

Explanation:

Answer 2

1st term a = a

common difference = 3a-a =2a

nth term =. a+(n-1)d

=a+(n-1)2a