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Show that the function f: R ->R is given...

Show that the function `f: R ->R` is given by `f(x)=1+x^2` is not invertible.

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RD SHARMA ENGLISH-FUNCTION-All Questions
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  11. Let f: Z->Z be defined by f(x)=x+2. Find g: Z->Z such that gof=IZ .

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  12. Which one the following relations on A={1,2,3} is function? f={(1,3),(...

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  19. Find whether f: R->R given by f(x)=x^3+2 for all x in R .

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