问题
选择题
函数f（x）=（1+sinx）2n-（1-sinx）2n（n∈N*），则f（x）是（ ）
A．奇函数
B．偶函数
C．既是奇函数又是偶函数
D．既不是奇函数又不是偶函数
答案
∵f（x）的定义域为R，
则f（-x）=（1-sinx）2n-（1+sinx）2n=-f（x）
∴f（x）是奇函数，
故选A．
搜题请搜索小程序“爱下问搜题”
函数f（x）=（1+sinx）2n-（1-sinx）2n（n∈N*），则f（x）是（ ）
A．奇函数
B．偶函数
C．既是奇函数又是偶函数
D．既不是奇函数又不是偶函数
∵f（x）的定义域为R，
则f（-x）=（1-sinx）2n-（1+sinx）2n=-f（x）
∴f（x）是奇函数，
故选A．
阅读短文，完成信息表。每小题填写不得超过三个词。请将答案填写在答题卷指定位置上。 I am Linda. There are five people in my family. They are my father, mother, brother, sister and me. We all have time in July，so we want to do something we like. On July 4th, my father has a soccer game with his friends. On July 10th, my mother goes to buy some clothes. On July 14th, my sister goes to her friend Lily’s birthday party. On July 20th, my family has a trip to Zhongshan Park. The next day, my brother has a basketball game. And I go to an English party on the last day.
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