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Consider f: Rrarr[-5, oo] given by f(x)...

Consider `f: Rrarr[-5, oo]` given by `f(x) = 9x^2 + 6x - 5`. Show that f is invertible with `f^(-1)(y)=[(sqrt(y+6)-1)/3]`

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The correct Answer is:
`(-1+sqrt(x+6))/3`
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