已知m+n=5.mn=3,

来源：学生作业帮助网编辑：六六作业网时间：2024/11/15 23:49:14

已知m+n=5.mn=3,已知m+n=5.mn=3, 已知m+n=5.mn=3,根号下N+1/M+1+根号下M+1/N+1的和的平方=[N+1]/[M+1]+2+[M+1]/[N+1]={[

已知m+n=5.mn=3,
已知m+n=5.mn=3,

已知m+n=5.mn=3,
根号下N+1/M+1+根号下M+1/N+1的和的平方
=[N+1]/[M+1]+2+[M+1]/[N+1]
={[[N+1][N+1]+[M+1][M+1]]/[[M+1][N+1]]}+2
={[N*N+M*M+2[N+M+1]]/[N*M+N+M+1]}+2
={[N+M][N+M]-2NM+2[N+M+1]]/[N*M+N+M+1]}+2
={5*5-2*3+2[5+1]}/[1+3+5]+2
={31/9}+2
=49/9
所以答案为7/3
=

收起

已知m+n=3,mn=2/3,求mn-mn+mn的值已知m-n=5.mn=-3 求下列-(m+4n-mn)-(2mn-2m-3n)+(2n-2m-3已知m-n=5.mn=-3 求下列-(m+4n-mn)-(2mn-2m-3n)+(2n-2m-3mn) 的值已知m-n=-5.mn=-3 求下列-(m+4n-mn)-(2mn-2m-3n)+(2n-2m-已知m-n=-5.mn=-3 求下列-(m+4n-mn)-(2mn-2m-3n)+(2n-2m-3mn) 的值已知m+n=5.mn=3, 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)的值已知MN^2=-6,求-MN(M^2N^5-MN^3-N)的值已知mn/m+n=2求3m-5mn+3n/-m+3mn-n 已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n 已知mn/m+n=2,求3m-5mn+3n/（-m）+3mn-n 已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值已知m-n=3,mn=-3,求(-m-4n-mn)-(2mn-2m-3n)-(3mn+2n-2m)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=4,mn=-1,求（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+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=2,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