f(x)=axˇ2-(3a-1)x+aˇ2在[1,+∞]上是增函数,求a的范围
问题描述:
f(x)=axˇ2-(3a-1)x+aˇ2在[1,+∞]上是增函数,求a的范围
答
f(x)=axˇ2-(3a-1)x+aˇ2在[1,+∞]上是增函数,
a0 对称轴x=(3a-1)/2a