Question

Which function is the inverse of f(x) = 2x + 3 ?

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

Answer 1

f^-1(x) =1/2x-3/2

f(x) = 2x + 3

f(x) - 3 = 2x

f(x)/2 - 3/2 = x

change x to f^-1(x) and f(x) to x