(1/2)已知P:方程X^2+MX+1=0有两个不等的负根;Q方程:4X^2+4(M-2)X+1=0无实根.若“P或Q”为真,“P且Q”...(1/2)已知P:方程X^2+MX+1=0有两个不等的负根;Q方程:4X^2+4(M-2)X+1=0无实根.若“P或Q”为真,“P且Q”为假,求
问题描述:
(1/2)已知P:方程X^2+MX+1=0有两个不等的负根;Q方程:4X^2+4(M-2)X+1=0无实根.若“P或Q”为真,“P且Q”...
(1/2)已知P:方程X^2+MX+1=0有两个不等的负根;Q方程:4X^2+4(M-2)X+1=0无实根.若“P或Q”为真,“P且Q”为假,求
答
p真:m^2-4>0,-m/22
q真:16(m-2)^2-16