Write the Recursive Formula for the given sequence.

Question

1, 4, 16, 64, 256, ...

a(n+1) = a(n) * -4; a(1) = 1?
a(n+1) = a(n) * -3; a(1) = 1?
a(n+1) = a(n) * 4; a(1) = 1?
a(n+1) = a(n) * 3; a(1) = 1?

Answer 1

well, it is clear that you keep multiplying by 4, right?
That only leaves one choice