Question

What is the rule for the nth term, an, when the first 4 terms of the sequence are 4, 16, 64, 256?

A.
an=(‒4)^n ‒ 1
B.
an=4n
C.
an=4^n ‒ 1
D.
an=4^n

Answer 1

4, 16, 64, 256

4¹, 4², 4³, 4⁴

Do you see the pattern?
`a_(n) = 4^(n)`

Answer: D