根据题意有:
2+2m+n=2
所以
2m+n=0
所以
n=-2m
将n=-2m代入(3m^3-m^2n+3mn^2-6mn^2+9n^3)\(5m^3+3m^2n-6mn^2+9n^3)得:
(3m^3-m^2n+3mn^2-6mn^2+9n^3)\(5m^3+3m^2n-6mn^2+9n^3)
=(-65m^3)/(-97m^3)
=65/97
设m和n均不为0,3x^2y^3和-5x^(2+2m+n)y^3是同类项.
设m和n均不为0,3x^2y^3和-5x^(2+2m+n)y^3是同类项.
求(3m³-m²n+3mn²+9n³)/(5m³+3m²n-6mn²+9n³)的值
求(3m³-m²n+3mn²+9n³)/(5m³+3m²n-6mn²+9n³)的值
数学人气:288 ℃时间:2019-10-19 05:21:29
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