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Let f: R->R be given by f(x)=x^2-3 . The...

Let `f: R->R` be given by `f(x)=x^2-3` . Then, `f^(-1)` is given by `sqrt(x+3)` (b) `sqrt(x)+3` (c) `x+sqrt(3)` (d) none of these

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given,
`f: R->R` be given by `f(x)=x^2-3`
let us consider,
`f^-1x=y`
`=>f(y)=x`
`=>y^2-3=x`
`=>y^2=x+3`
`=>y=pmsqrt(x+3)`
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