Question

Se 2^n = 15 e 2^p = 20, o valor de 2^n–^p+^3 é: 
a) 6  
b) 8  
c) 14  
d) 16

Answer 1

$2^{n-p+3} = \frac{ 2^{n}. 2^{3} }{ 2^{p} } \\ \\ 2^{n-p+3}= \frac{15.8}{20} \\ \\ 2^{n-p+3}=6$