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Undefined
-3 0
You should be careful to solve negative exponent. You should must solve negative exponent by reducing to positive exponent.
1 = --- 3 0 1 = --- 0 = Undefined
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1/3 -2/3 2n - 2n -------------- = ? -2/3 2n
_____________________ / _____________ / / ____ / / / 2 / 4 / 4 . / 4 / \/ \/ / -------------------- / 3 \/ 2