Question

What Is The Next Item In The Pattern?
-1, 2, -4, 8 ....
A)-16 B)-4
C)4 D)16

Answer 1

I'd say it's -16.

Answer 2

Hint:\[f(n)=(-1)^{n+1}2^n,n\in\mathbb{N}\]

Answer 3

Lol... nice hint across.

Answer 4

\[\mathbb{N}=\{0,1,2,...\}\]

Answer 5

XD

Answer 6

well said!