# Math Help - Changing an expression?

1. ## Changing an expression?

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?

2. ## Re: Changing an expression?

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*}

3. ## Re: Changing an expression?

I am still not getting it....

4. ## Re: Changing an expression?

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

*When you have nested exponents you multiply them.

5. ## Re: Changing an expression?

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

6. ## Re: Changing an expression?

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