Question

Which of the following is the algebraic expression that best describes the sequence 4, 16, 64, 256, 1024, …?

Answer 1

D would be the right answer. 4^1 = 4, 4^2 = 64 and so on

Answer 2

it's D.

x=1 : 4^1= 4X1=4
x=2 : 4^2= 4X4=16 
x=3 : 4^3= 4x4x4=64
x=4 : 4^4= 4x4x4x4=256
x=5 : 4^5=4x4x4x4x4=1024