Question

What are the first three terms of the sequence: a1=4 and an=2(an-1)^2

Answer 1

Given    A1=4     An=2(an-1)^2
From     A2=2(A1)^2=2(4^2)=2(16)=32
so that's    A3=2(A2)^2=2=2(32)^2=2(1024)=2048
thus...
A1=4
A2=32
A3=2048