化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0) y/(3x-y)*根号下(9x^3y-6x^2
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化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0) y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)
化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0)
y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)
化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0)
y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)
![化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0) y/(3x-y)*根号下(9x^3y-6x^2](/uploads/image/z/1353218-50-8.jpg?t=%E5%8C%96%E7%AE%80%3A7y%2F2x%2A%E6%A0%B9%E5%8F%B7%E4%B8%8B%281%2Fy%5E2%29-%28x%2Fy%5E3%29+%E4%B8%94%28y%3Ex%3E0%29+y%2F%283x-y%29%2A%E6%A0%B9%E5%8F%B7%E4%B8%8B%EF%BC%889x%5E3y-6x%5E2)
7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0)
=7y/2x*1/y√(1-x/y)
=7/2x√(y-x)/y
=7/2xy√(y²-xy)
y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)
=y/(3x-y)*1/y√(9x³y-6x²y²+xy³)
=1/(3x-y)√xy(9x²-6xy+y²)
=1/(3x-y)√xy(3x-y)²
=1/(3x-y)*(3x-y)√xy
=√xy
=7y/2x*1/y√(1-x/y)
=7/2x√(y-x)/y
=7/2xy√(y²-xy)
y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)
=y/(3x-y)*1/y√(9x³y-6x²y²+xy³)
=1/(3x-y)√xy(9x²-6xy+y²)
=1/(3x-y)√xy(3x-y)²
=1/(3x-y)*(3x-y)√xy
=√xy
化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0) y/(3x-y)*根号下(9x^3y-6x^2
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