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April 26th, 2016, 07:38 AM  #1 
Newbie Joined: Mar 2016 From: Europe Posts: 8 Thanks: 0  Evaluating exponents
Hi, I have a few questions about this task. 1. Why and how does the negative sign disappear? 2. Why do you not change the reciprocal of the exponent too? 3. How can (27/8 ) ^2/3 be rewritten as 27^2/3 / 8 ^ 2/3 ? I've attached an image of the task below. Thank you very much for your help!! 
April 26th, 2016, 08:00 AM  #2 
Senior Member Joined: Dec 2015 From: holland Posts: 162 Thanks: 37 Math Focus: tetration 
x^1 = 1/x (a/b)^n = (a^n)/(b^n) 
April 26th, 2016, 08:52 AM  #3  
Banned Camp Joined: Jun 2014 From: Earth Posts: 945 Thanks: 191  Quote:
"(27/8)^(2/3) be rewritten as 27^(2/3)/8^(2/3)" or "(27/8)^(2/3) be rewritten as [27^(2/3)]/[8^(2/3)], as a couple of the allowable ways." At any rate, you need grouping symbols around those fractional exponents.  

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evaluating, exponents, fractions 
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