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If `f: Q->Q ,\ \ g: Q->Q` are two functions defined by `f(x)=2x` and `g(x)=x+2` , show that `f` and `g` are bijective maps. Verify that `(gof)^(-1)=f^(-1)\ og^(-1)` .

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RD SHARMA ENGLISH-FUNCTION-All Questions
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  19. Write total number of one-one functions from set A={1,\ 2,\ 3,\ 4} ...

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  20. If f: R->R is defined by f(x)=x^2 , write f^(-1)(25) .

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