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Range of the f(x) = (e^(x) - 1)/(e^(x) +...

Range of the `f(x) = (e^(x) - 1)/(e^(x) + 1)`

A

`(0, oo)`

B

`(-oo, 0)`

C

`(1, oo)`

D

`(-1, 1)`

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The correct Answer is:
D
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