Question

How do you find the first five terms of the geometric sequence `a_1=1` and r=4?

Answer 1

See explanation.

Explanation:

In a geometric sequence every term (except the first one) can be calculated by multiplying the previous one by `r`, so:

`a_1=1`

`a_2=a_1xxr=1xx4=4`

`a_3=a_2xxr=4xx4=16`

`a_4=a_3xxr=16xx4=64`

and so on.