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posted by kozy Tuesday, May 3, 2011 at 2:11am.
Rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero.(6xy/y)^-3
(6XY/Y)^-3, (6X)^-3, 6^-3X^-3, 1 / 6^3X^3 = 1 / 216X^3
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