Question

Use the formula for the general term​ (the nth​ term) of a geometric sequence to find the indicated term of the following sequence with the given first​ term, a1​, and common​ ratio, r. find a8 when a1=5, and r=3

Answer 1

a8=10935

Explanation:

A geometric sequece is a sequence of the form

`a_n=a\cdit r^(n-1)`

in our case we know that
`a=a_1=5` and
`r=3`, hence

`a_8=5 \cdot 3^7=10935`