Question 773630
(1) Substitute x = -4 in F(x).
F(x) = 3*2^(-4)
 
(2) Recall that a^(-x) = 1/(a^x).
F(x) = 3*[1/(2^4)]
 
(3) 2^4 = 16
F(x) = 3*[1/16]
F(x )= 3/16