Consider `f: Rvec[-5,oo)`given by `f(x)=9x^2+6x-5`. Show that `f`isinv – InterviewSolution

InterviewSolution

1.	Consider `f: Rvec[-5,oo)`given by `f(x)=9x^2+6x-5`. Show that `f`isinvertible with `f^(-1)(y)=((sqrt(y+6)-1)/3)dot`
Answer» Correct Answer - `f^(-1) (y)= (sqrt(y+6)-1)/(3)` `y=(3x+1)^(2)-6 rArr x =(sqrt(y+6)-1)/(3) rArr f^(-1) (y)= (sqrt(y+6)-1)/(3)`

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