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exponents PS, whats the fastest way to solve this?

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by VP_Jim » Mon May 18, 2009 7:04 pm
This is a toughie. I think the easiest way to do this is to think of the numerator and the denominator as a difference of two squares. The numerator is:

(1001-999)(1001+999) = 4,000

And the denominator is:

(101-99)(101+99) = 400

4000/400 = 10

Hope this helps!
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by dumb.doofus » Mon May 18, 2009 11:47 pm
This is a general formula...

a^2 - b^2 = (a+b)(a-b)

just apply that..
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