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posted by aly on Saturday, January 19, 2013 at 8:03pm.
Simplify the rational expression in the form A/B. X^-2+X^-4. Express the final result in a single fraction using positive exponents only.
x^-2+ x^-4 = 1/x^2 + 1/x^4 =(x^2 +1)/x^4
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