Question

Dada a função exponencial f(x)=(1/2)^-x
a)f(-2)=
b)f(2)=
c)f(0)=
d) x , para f(x)=64

Answer 1

f(x)=(1/2)^-x 

a)f(-2)= (1/2)^-(-2) = (1/2)^2 = 1/4
b)f(2)= (1/2)^-2 = 2^2 = 4
c)f(0)= (1/2)^0 = 1

d) x , para f(x)=64
(1/2)^-x = 64
2^x = 2^6
x = 6

=)