5^1/5 = 5^-5 right?

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Actually, it is my belief that 5^1/5= the fifth root of 5. here is a good link, with some practice, you might want to scroll down about 1/4 of the way down the page to "Fractional Exponents" http://www.themathpage.com/Alg/rational-exponents.htm

I ve decided you should ignore anything I ve said, given my confused and sleep deprived state. (I am know thinking that the first comment I left you was right)- I recommend trying them out on a calculator... sorry babe