1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 22:13:29
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
M-MN=3N -> M = 3N/(1-N)
代入 1/M+1/N=5 (3M+MN+2N) / (M-MN)
化简为:N^2 + 15 N - 1 = 0
解一元二次方程得N(两解)
代入M = 3N/(1-N),得 M
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值
已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值
-2(mn-3m平方)-{m平方-5(mn-m平方)+2mn,其中m=1,n=-2
已 知m-n=4,mn=-1,求:(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值
已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=4,mn=-1,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值.
若m-n=4,mn=-1,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)
若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)
已知m-n=4,mn=-1,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
先化简再求值:5m²n-1/2(8mn+2n²)+4(m²n+mn-2n²).其中m=-3,n=2
已知m=1/5,n=-1,求3(m^2n+mn)-2(m^2n-mn)-m^2n的值
m^2+n^2+1=mn+m+n,求3m-4n
(m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1
3(m^2-mn+2n^2)-2(mn-m^2+n^2)+(5mn-4n^2+1)
4(-2mn+2m+3n)-2(3m+5n-mn),其中m+n=3,mn=-1