题目

补全对话 根据对话内容，在每小题的空白处写出一个完整的句子，使对话意思完整正确。 Woman: Hello! May I help you? Susan: I’d like some casual clothes. Woman:                       （1）Jeans, T-shirts and jackets are over there. （Later） Susan: Let me have a look at the white T-shirt. Woman: I think it may be too small for you . Susan:                                    （2） Woman: Yes, we have, but they are yellow and light blue. Susan:                            �设函数f(x)=a•b，其中向量a=(2cosx，1)，b=(cosx，3sin2x)，x∈R（1）若函数f（x）=1-3，且x∈[-π3，π3]，求x；（2）求函数y=f（x）的单调增区间．