81 to the 3/4 I know the answer is 27 but how

and

express square root of 2 over square root of 2 + 1 in the form a+bsquare root2, where a and b are integers

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- Sep 22nd 2008, 12:54 PM #1

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- Sep 22nd 2008, 12:59 PM #2

- Sep 22nd 2008, 01:03 PM #3