Question

Inverse fraction of f(x)=2x+1

Answer 1

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

Explanation:

let f(x) = y, then y = 2x + 1

rearrange, making x the subject

subtract 1 from both sides

y - 1 = 2x ( divide both sides by 2 )

x =
`(y-1)/(2)`

change y back into terms of x

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