Question

2^n+2-2^n+1 per 2^n - 2^n+1​
A. 24
B. 12
C. 9/2
D. -9/2
E. -2

Answer 1

(2^(n+2)-2^(n+1) /(2^n - 2^(n+1))=

(2²*2^n-2*2^n /(2^n - 2*2^n)=

(4*2^n-2*2^n /(2^n - 2*2^n)=

2^n(4-2)/2^n(1-2)=

2/(-1)=-2