问题
填空题
已知点P(2,2)在曲线y=ax3+bx上,如果该曲线在点P处切线的斜率为9,则函数f(x)=ax3+bx,x∈的值域为_______
答案
[-2,18]
已知点P(2,2)在曲线y=ax3+bx上,如果该曲线在点P处切线的斜率为9,则函数f(x)=ax3+bx,x∈的值域为_______
[-2,18]
Passage One
The galaxy turns ______like a wheel.
A.round the sun
B.from our position
C.from the middle point
D.round the middle point