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## Homework Statement

2^log2(x^2+1)

2 after the log function is actually the base.

## Homework Equations

derivative of log(x)= 1/x

derivative of a^x = a^x lna

## The Attempt at a Solution

= 2^log2(x^2+1) ln2 *d[log2(x^2+1)]/dx

= 2^log2(x^2+1) ln2 [2x/(x^2+1)ln2]

ln2 in the numerator cancels with that in denominator but at the back of the book the answer written is x^2+1 which i'm not getting.

Regards