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The largest interval on which the function f(x)=e^(-x^2/2) is not invertible, is

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Solution:   We have   ,  f(x)=e^frac-x^22

                The given function is even  forall  x in R

               Rightarrow   It is not one-one on any domain containing

                point  on either side of the origin.

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Deependra Verma

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