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If R, is the set of all non - negative real numbers prove that the function f:R_(+) to [-5, infty]" defined by "f(x)=9x^(2)+6x-5 is invertible. Write also f^(-1)(x).

Answer»


Answer :`f^(-1)X=(sqrt(x+6)-1)/3forall x e in R_(f) = [-5, INFTY)`


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