SOLUTION: I need help with two problems. Write answers with positive exponents. (7/y^-4)^-3 I am getting 1/343y^12 but I don't think thats in positive exponents. Same with this prob

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Question 873670: I need help with two problems.
Write answers with positive exponents.
(7/y^-4)^-3
I am getting 1/343y^12 but I don't think thats in positive exponents.
Same with this problem.
(4^-2xy^2)^-3
I am getting 1/4^2xy

Found 2 solutions by LinnW, ankor@dixie-net.com:
Answer by LinnW(1048) About Me  (Show Source):
You can put this solution on YOUR website!
%287%2Fy%5E-4%29%5E-3
%287%5E%28-3%29%29%2F%28y%5E%28%28-4%29%2A%28-3%29%29%29
1%2F%28%287%5E3%29%28y%5E%2812%29%29%29
This is equal 1/343y^12 so I think you had it right.

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Write answers with positive exponents.
(7/y^-4)^-3
I am getting 1/343y^12 but I don't think that's in positive exponents.
But you are Right!
Reciprocal gets rid of the neg
%287y%5E4%29%5E-3 = %281%2F%287y%5E4%29%29%5E3 = 1%2F%28343y%5E12%29
:
Same with this problem.
I got a different answer on this one, perhaps you can check your work.
%284%5E-2xy%5E2%29%5E-3 = %28%28xy%5E2%29%2F4%5E2%29%5E-3 = %28%28xy%5E2%29%2F16%29%5E-3 = %2816%2F%28xy%5E2%29%29%5E3 = %2816%5E3%2F%28x%5E3y%5E6%29%29 = %284096%2F%28x%5E3y%5E6%29%29