使下列分式中不含负号15yx22a2b34m3n4x2y这个真不知道,哈哈,小学没毕业!Q5y/x?2,已知x22x1m20m0怎样求到mx1m请写出详细过程由题意得x2-2x+1≤m2∴(x-1)2≤m2∴x-1≤m的绝对值∴-m≤x-1≤mm-3n=2x+1-3x+3=-x+4=0,x=4m+n=123,lim3n2n5n33n1的解法分子分母同时除以n^3,得到:lim(3/n+1/n^2+5/n^3)/(1+3/n^2+1/n^3)=0lim(n→+∞)3n+1/4n+3=lim(n→+∞)[