若不等式mx^2+mx-4
问题描述:
若不等式mx^2+mx-4
答
整理得(m-2)x²+(m-2)x-3<0若对任意实数x均成立1若m-2=0,即m=2时,满足2若m-2≠0只需满足 m-2<0△=(m-2)²-4(m-2)(-3)<0解得 m<2△=(m-2)²+12(m-2)<0(m-2)(m+10)<0解得 -10<m...
若不等式mx^2+mx-4
整理得(m-2)x²+(m-2)x-3<0若对任意实数x均成立1若m-2=0,即m=2时,满足2若m-2≠0只需满足 m-2<0△=(m-2)²-4(m-2)(-3)<0解得 m<2△=(m-2)²+12(m-2)<0(m-2)(m+10)<0解得 -10<m...