fun-lim

Question: Which of the following function is even function

1) $f(x)=\frac{{{a}^{x}}+1}{{{a}^{x}}-1}$

2) $f(x)=x\left( \frac{{{a}^{x}}-1}{{{a}^{x}}+1} \right)$

3) $f(x)=\frac{{{a}^{x}}-{{a}^{-x}}}{{{a}^{x}}+{{a}^{-x}}}$

4) $f(x)=\sin x$

Solution:

Explanation: No Explanation

Functions

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