Question

If Fx) = 7x, which of the following is the inverse of F(x)?

Answer 1

Inverse functions

If we want to find the inverse function of

F(x) = 7x

we say y = F(x):

F(x) = 7x

y = 7x

We clear x from the equation:

y = 7x

y/7 = x

Now we have the inverse function 7/y, we just replace y by x

F¹(x) = x/7