高中数学恒成立问题总结

1,;2,;3,1231xRmxRm2k0m3x2x203mx2mx22kx2x)x(f21xk)x(fx1x12a1200722,)(kxexfx)(Rx1ek)(xf20kRx0)(xfk22)1()1ln()(xxaxf)(xf2x1a2eex1,11kxf)(k)x(famax)x(fa)x(f)x(famin)x(fa)x(f1)xalg(ax2lg6xx11ab11a+b011123a11m)1x(m1x222m2)x(f1)1(f0ba)b(f)a(f)x(f21x2f21xf1am2m)x(f2]11[x