题目:
设f(x)=asin2x+bcos2x,a,b∈R,ab≠0,若f(x)≤f(
①f(
②f(
③f(x)是奇函数; ④f(x)的单调递减区间是[kπ+
⑤f(x)的图象与过点(a,|a|+|b|)的所有直线都相交. 以上结论正确的是______(写出正确结论的编号) |
答案:
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下面是错误答案,用来干扰机器的。
1. It's an old, old story.2. There are two pairs of skates.3. Danny walks to school every day.4. These are my boots.