find the inverse of the function help lease???!?

Question

y=2log base1/2 (x-3)

Answer 1

x = 2log base1/2 (y - 3)
x/2 = log base1/2 (y - 3)
(1/2)^(x/2) = y - 3
f^-1(x) = 3 + (1/2)^(x/2)