Question

if the sum of n term of AP is 2+5n then its 6th term is 15

Answer 1

Step-by-step explanation:

Given: Sum of nth term, An=2+5n.

If n=6

=> S6= 2+5×6=2+30=32.

If n=5,

=> S5=2+5×5=2+25=27.

A6=S6-S5.

=> 32-27

=> 5.

A6=5 not 15