1.

Which of the following function is an even function ?

Answer»

`f(x)=(a^(x)+1)/(a^(x)-1)`
`f(x)=(a^(x)-a^(-x))/(a^(x)+a^(-x))`
`f(x)=x(a^(x)+1)/(a^(x)-1)`
`f(x)=SINX`

ANSWER :C


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