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Let f:R rarr R" be defined by "f(x)=(e^(...

Let `f:R rarr R" be defined by "f(x)=(e^(|x|)-e^(-x))/(e^(x)+e^(-x)).` Then

A

f is both one - one and onto

B

f is one - one but not onto

C

f is onto but not one - one

D

f is neither one - one nor onto

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The correct Answer is:
D
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FIITJEE-TIPS-OBJECTIVE
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