Question

Each of the following functions, f, has domain R(all real numbers). Find f^-1(x).

a) f(x)=5x+7

Answer 1

\[f^{-1}(x) =\frac{x-7}{5}\]

Answer 2

How did you get it?

Answer 3

Your expression was \[y=f(x)=5x+7\]. I need to find an equation which represents x in terms of y, and so
\[y=5x+7\implies y-7=5x\implies \frac{y-7}{5}=x\]

Answer 4

Now just exchange the variables.

Answer 5

Did you get it?

Answer 6

Yes I did. Thanks

Answer 7

order nonono u stink