Question

A(n) =-5 x 2^n-1 , find the fourth and eighth terms of the sequence.

Answer 1

1)Substitute n with 4.
2) Substitute n with 8.

You get the answers ;)

Answer 2

n means the nth term and we need 4th and 8th terms

Answer 3

A(4)=-5*2^4-1=-81
A(8)=-5*2^8-1=-1281