Question

Find f ^−1(x) for the function.

Answer 1

Answer:
`(-7x)/(x-1) or (7x)/(1-x)`

Explanation:

you do this by swapping x and y values

so it becomes x = y/(y+7)

cross-multiply to get

x(y+7) = y

xy + 7x = y

xy - y = -7x

y(x-1) = -7x

y = -7x/(x-1)

y =
`(-7x)/(x-1) or (7x)/(1-x)`