Question

2 ^n+1 - 2^n per 2^n - 2^n-1 = ....
a. 2
b. 1/2
c. -2
d. -1/2

ps: ^ = pangkat
pakai cara

Answer 1

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