Question

Find the range of \[x=\frac{ 2^y-2^{-y} }{ 2^y + 2^{-y} }\]

Answer 1

@amistre64 @Chlorophyll

Answer 2

For fractions, the restriction is that your denominator can never be zero.
So...
Can it be zero?

Answer 3

\[2^{y}\]-ALWAYS positive

\[2^{-y} = \frac{1}{2^{y}}\]-ALWAYS positive

What about their sum, then?

Answer 4

Positive

Answer 5

Yup..man./....that make sense...and thxxx..i got it....