JEE Math Practice Question
The function $f:(-\infty, \infty) \rightarrow(-\infty, 1)$, defined by $f(x)=\frac{2^x-2^{-x}}{2^x+2^{-x}}$ is :
- A.One-one but not onto
- B.Onto but not one-one
- C.Both one-one and onto
- D.Neither one-one nor onto
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