Changing an expression?

**M670** · September 29th 2012, 06:44 PM

The expression

can be written as

, where

is a function of

. Find

.

This is my question I need to answer, really unsure of the whole thing
I know I need to make the second formula 2^f(x) reflect the first one just not sure how to proceed?

**Prove It** · September 29th 2012, 07:26 PM

Originally Posted by M670

The expression

can be written as

, where

is a function of

. Find

.

This is my question I need to answer, really unsure of the whole thing
I know I need to make the second formula 2^f(x) reflect the first one just not sure how to proceed?

Hint: $\displaystyle \begin{align*} \left(a^n\right)^p = a^{n \cdot p} \end{align*}$

**M670** · September 30th 2012, 12:21 PM

I am still not getting it....

**sjmiller** · September 30th 2012, 12:27 PM

f(x) = (8x)(7x) = 56x^2

*When you have nested exponents you multiply them.

**M670** · September 30th 2012, 12:45 PM

I can't believe it was that simple....
thank you, this i will for sure remember come exam time

**sjmiller** · September 30th 2012, 01:00 PM

Originally Posted by M670

I can't believe it was that simple....
thank you, this i will for sure remember come exam time

You should review the laws of exponents. It will prove to be extremely helpful for all your math endeavours down the road.

http://t0.gstatic.com/images?q=tbn:A...WgY4UMPUg_dAHQ

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