Respuesta :

Riia

It is given in the question that f is a one-to-one function.

And for a one-to - one function,

If

[tex] f(a)=b, \ then \ f^{-1} (b) =a [/tex]

So we will get

[tex] a. If \ f(3)=15, \ then \ f^{-1} (15) =3 \\ b. If \  f^{-1}(6)=4, \ then \ f(4)=6 [/tex]

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