Tamara J. | Math Tutoring - Algebra and Calculus (all levels)Math Tutoring - Algebra and Calculus (al...

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To make a negative exponent positive, move the base and its exponent to the opposite location in the fraction (reciprocation). That is, a^{-n} = 1/a^{n} and 1/a^{-n} = a^{n}.

Using the laws of exponents, we can prove the above by the following: