题目内容:
1. 已知函数y = f ( x )的导数如下,问函数在什么区间内单调增加?(1)f′( x ) = x( x - 2) (2)f′( x ) = ( x + 1)2( x + 2)
(3)f′( x ) = x3(2 x - 1) (4)f′( x ) =
2/(x+1)^3
2. 求下列函数的单调区间:
(1)f ( x ) = x2 - 5x + 6 (2)f ( x ) =1/x
(3)f ( x ) = x4 - 2x2 + 1 (4)f ( x ) = x2 - lnx
参考答案: