Question

Given the function f(x) = 4(x+3) − 5, solve for the inverse function when x = 3.

−21

−16

−10

−1

Answer 1

In mathematics, an inverse function is a function that "reverses" another function. We obtain the inverse of the function as follows:

f(x) = 4(x+3) − 5
(f(x) + 5)/4= (x+3) 
x = ((f(x) + 5)/4) - 3

y = ((x + 5)/4) - 3
 
when x = 3
y = ((3 + 5)/4) - 3
y = -1 <-----OPTION D