题干

下列命题:

1)y=|cos(2x+

π
6
)|最小正周期为π;

2)函数y=tan

x
2
的图象的对称中心是(kπ,0),k∈Z;

3)f(x)=tanx﹣sinx在(﹣

π
2
π
2
)上有3个零点;

4)若 abbc ,则 ac

其中错误的是____

上一题 下一题 0.0难度 选择题 更新时间:2017-03-20 01:35:36

答案(点此获取答案解析)

(1)(3)(4)

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