SOLUTION: Simplify 4(r^5)^-1/ 7(-r^-2)^4

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Question 980141: Simplify
4(r^5)^-1/ 7(-r^-2)^4
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
4(r^5)^-1/ 7(-r^-2)^4

=4r^-5/7(1/r^2)^4
=4r^-5/7(1/r^8); invert when dividing, and r^-5*r^8=r^3
=4r^3/7