Question 153534:  1/81 to the exponent of -3/4 
 Answer by stanbon(75887)      (Show Source): 
You can  put this solution on YOUR website! 1/81 to the exponent of -3/4 
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The negative means "invert". 
The 4 means "take the 4th root". 
The 3 means "raise to the 3rd power". 
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Inverting you get 81^(3/4) 
Taking the 4th root you get 3^3 
Raising to the 3rd power you get 27 
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Cheers, 
Stan H. 
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