# Thread: Problems with indices

1. ## Problems with indices

((a^4)b)/(c^2)^^-1/2

Thank you!

2. Not much you can do from there...

$\left(\frac{a^4b}{c^2}\right)^{-1/2}$

Is this thing you wanna reduce?

3. Yes, I am sorry I do not know how to use tags.

I tried to take away the fractions by multiplying by a^2 and c, but I couldn't
get the right answer.

4. See the LaTeX Tutorial

Now, we have that $\left(\frac{c^2}{a^4b}\right)^{1/2}=\frac c{a^2\sqrt{b}}$

Does that make sense?

5. Yes that makes sense, but according to my math book the answer is $\frac{c\sqrt{b}}{a^2 b}$ .

6. Originally Posted by Coach
Yes that makes sense, but according to my math book the answer is $\frac{c\sqrt{b}}{a^2 b}$ .
What's the matter?

Multiply numerator and denominator by $\sqrt b$ to my answer and you'll get the desired.