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Exponent Simplification question

Expert replies
Source: — Problem Solving |

Re: Exponent Simplification question

by logitech » Thu Nov 06, 2008 6:14 pm
Lakers09 wrote:Hi All,

I have a question reagarding the simplification below. How does the second 4^x simplify down to 1 without the first 4^x changing form?


4^x(1/4) – 4^x < -120


4^x[(1/4) – 1] < -120


Thanks
So lets call 4^x = A

A (1/4) - A < - 120

OR

A/4 - A < -120

so

A [ (1/4) -1] < -120

A (-3/4) < -120

A > 160 ( Please note the change of the equation direction )
LGTCH
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by raunekk » Thu Nov 06, 2008 9:10 pm
we just need to take out 4^x as common as logitech has shown,,,
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by jnellaz » Fri Nov 07, 2008 6:05 am
Thanks Logitech!
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