No idea how to do this either.

Algebra
Tutor: None Selected Time limit: 1 Day

Jul 15th, 2015

Thank you for the opportunity to help you with your question!

f(x)=y=sqrt(x-3)

Interchanging x and y, we get

x = sqrt(y-3)

Or, y =x^2+3       

Or, f^-1=x^2+3       Ans. 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 15th, 2015

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