b^4/a^5除以b^3/a^4=急

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b^4/a^5除以b^3/a^4=急b^4/a^5除以b^3/a^4=急b^4/a^5除以b^3/a^4=急b/ab^4/a^5除以b^3/a^4=(b^4a^4)/(a^5b^3)=b/a

b^4/a^5除以b^3/a^4=急
b^4/a^5除以b^3/a^4=

b^4/a^5除以b^3/a^4=急
b/a

b^4/a^5除以b^3/a^4 = (b^4a^4) / (a^5b^3) = b/a