Question 15041
<font face = "courier new"><b>(27y<sup>9</up>)<sup>-1/3</up>
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Write 27 as 3<sup>3</sup>
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(3<sup>3</sup>y<sup>9</sup>)<sup>-1/3</sup>
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Multiply the outer exponent -1/3 by each inner exponent:
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3<sup>-1</sup>y<sup>-3</sup>
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To get rid of the negative exponents move base and exponent from 
numerator to denominator and chaneg the sign of the exponent to +
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` 1
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3<sup>1</sup>y<sup>3</sup>
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Erase the 1 exponent
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` 1
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`3y<sup>3</sup>
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Edwin
AnlytcPhil@aol.com