# Help needed

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• Jan 27th 2008, 06:18 PM
Aerillious
Help needed
Write as a single power. Express answers with posative exponents.

[(-8)^6]^-2
------------
[(-8)^-4]^3

If anyone could help I would greatly appreciate it.
• Jan 27th 2008, 06:27 PM
Jhevon
Quote:

Originally Posted by Aerillious
Write as a single power. Express answers with posative exponents.

[(-8)^6]^-2
------------
[(-8)^-4]^3

If anyone could help I would greatly appreciate it.

$\frac {\left[ (-8)^6 \right]^{-2} }{\left[ (-8)^{-4} \right]^3} = \frac {(-8)^{-12}}{(-8)^{-12}}$ .............since $(x^a)^b = x^{ab}$

so this is just $1$

i hate questions that have answers like that, it cuts the teaching lesson short. we didn't even get to use the fact that $\frac {x^a}{x^b} = x^{a - b}$