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posted by k Monday, March 5, 2012 at 1:55am.

evaluate f(x) = x^-2/3 + x^-3 for each value of x. f(-8)

(-8)^2/3 + (-8)^-3 = (-2)^2 + (-8)^-3 = 1/4 - 1/512 = 127/512

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