1.

Which of the following funcitons is not injective ?

Answer»

`F(x)=|x+1|, x in [-1, 0]`
`f(x)= x+1//x , x in (0, OO)`
`f(x)=x^(2)+4x-5`
`f(x)=e^(-x), x in [0, oo)`

ANSWER :B::C


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