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Mathematics 7 Online
OpenStudy (anonymous):

Help very confused!!! Will post problem

OpenStudy (anonymous):

\(\Huge\color{blue}{.-.}\)

OpenStudy (anonymous):

\[f(x)=^{3}\sqrt{x-2}\] Find inverse function

OpenStudy (anonymous):

To find the inverse: Replace f(x) with y Switch x's and y's, so put x where y is and x where y is. Solve for y Replace y with f^-1(x)

OpenStudy (anonymous):

\[x ^{3}= y-2\]

OpenStudy (anonymous):

what i got down to

OpenStudy (anonymous):

Well lets do it step by step \[y = \sqrt[3]{x-2} \implies x = \sqrt[3]{y-2} \implies x^3 = y-2\] so you're at this part, now use the opposite operation of -2 to both sides so we can isolate y.

OpenStudy (anonymous):

\[x ^{3} +2=y\]

OpenStudy (anonymous):

There you go!

OpenStudy (anonymous):

Now replace y with \[f^{-1}(x)\]

OpenStudy (anonymous):

That represents inverse :)

OpenStudy (anonymous):

\[f ^{-1} (x)\]

OpenStudy (anonymous):

one side

OpenStudy (anonymous):

Yup! So \[f^{-1}(x) = x^3+2\]

OpenStudy (anonymous):

Pretty simple right? :)

OpenStudy (anonymous):

yeah i think i understand now.

OpenStudy (anonymous):

thank you very much

OpenStudy (anonymous):

Np, take care!

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