已知0已知0已知0△=1-mn≥0,mn≤1.由题意,0方程m/4乘x^2+x+n=0有实数根,则1-mn>=0, mn<=1p(mn<=1)=(ln4+1)/4=0.59657
已知0△=1-mn≥0,mn≤1.由题意,0
方程m/4乘x^2+x+n=0有实数根,则1-mn>=0, mn<=1p(mn<=1)=(ln4+1)/4=0.59657