先化简 再求值 [(-3mn)^2*m^3-2m^2(3mn^2)^3*0.5n]/(-3m^2n)^2 m=10 n=
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先化简 再求值 [(-3mn)^2*m^3-2m^2(3mn^2)^3*0.5n]/(-3m^2n)^2 m=10 n=1
![先化简 再求值 [(-3mn)^2*m^3-2m^2(3mn^2)^3*0.5n]/(-3m^2n)^2 m=10 n=](/uploads/image/z/5882928-24-8.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80+%E5%86%8D%E6%B1%82%E5%80%BC+%5B%28-3mn%29%5E2%2Am%5E3-2m%5E2%283mn%5E2%29%5E3%2A0.5n%5D%2F%28-3m%5E2n%29%5E2+m%3D10+n%3D)
[(-3mn)^2*m^3-2m^2(3mn^2)^3*0.5n]/(-3m^2n)^2
=[9*m^2*n^2*m^3-2*m^2*27*m^3*n^6*0.5n]/ (9*m^4n^2)
=m-3mn^5
=10-3*10*1^5
=10-30
=-20
=[9*m^2*n^2*m^3-2*m^2*27*m^3*n^6*0.5n]/ (9*m^4n^2)
=m-3mn^5
=10-3*10*1^5
=10-30
=-20
先化简 再求值 [(-3mn)^2*m^3-2m^2(3mn^2)^3*0.5n]/(-3m^2n)^2 m=10 n=
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