Hopefully you can understand this from the notation. I think if you write it down the solution will make more sense. It may help to clarify it if you write the equation reversed
(i.e. (ab^2)^1/4=a^1/4*b^2/4)
a^1/4*b^2/4=(ab^2)^1/4 (remember ONLY the "b" term is squared)
is the same as: a^1/4*b^2/4=(a^1b^2)^1/4
So you could say: a^1/4*b^2/4=(a^1)^1/4*(b^2)^1/4
which is the same as saying: a^((1*1)/4)*b^((2*1)/4)
Hope this helps!
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