A.(-∞,-3)∪(1,4) B.(-∞,-3)∪(-1,0)∪(1,+∞) C.(-∞,-3)∪(-1,1)∪(3,+∞) D.(-∞,-3)∪...

作者: tihaiku 人气: - 评论: 0
问题
选项 A.(-∞,-3)∪(1,4) B.(-∞,-3)∪(-1,0)∪(1,+∞) C.(-∞,-3)∪(-1,1)∪(3,+∞) D.(-∞,-3)∪(-1,0)∪(1,3)
答案 D
解析 函数f(0)是奇函数,故f(0)=0,又f(-3)=0,则f(3)=0,且函数图象关于原点对称,在区间[0,2]与[2,+∞)上分别是递减和递增,故函数图象在(-∞,-2)递增,在(-2,O)递减。图象如下:

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