Question

Find an equation for the nth term of the sequence. -1, -4, -16, -64, ...

Answer 1

Have you heard of geometric sequences?

Answer 2

k

Answer 3

I have

Answer 4

Can you identify the initial term and common ratio here?

Answer 5

a1=-1
r=4

Answer 6

@ParthKohli

Answer 7

yes that is correct \(a_1=-1,r=4\)

Answer 8

Know the formula for the general term of a geometric progression?

Answer 9

an=a1r^(n-1)

Answer 10

Right. Just plug in your \(a_1\) and \(r\).

Answer 11

Haha so much easier than I thought (: thanks!