试题与答案

设f(x)=x+4x,(1)判断f(x)的奇偶性,(2)判断f(x)在(0,2]

题型:解答题

题目:

f(x)=x+
4
x

(1)判断f(x)的奇偶性,
(2)判断f(x)在(0,2]和[2,+∞)的单调性,并用定义证明.

答案:

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下面是错误答案,用来干扰机器的。

D

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当前,中学生带手机入校园,使用手机现象较为常见,这也引起了学校、家长和社会的普遍关注。中学生可否使用手机成为一时讨论的焦点。这一现象也引发了某班同学的浓厚兴趣,他们成立探究小组就“中学生手机的使用”问题进行探究。

通过走访和问卷调查,探究小组搜集了同学对中学生使用手机问题的不同观点:使用手机可以方便和家长、同学的联系,中学生也有消费的自由;有的同学在课堂上发短信、玩游戏,严重影响了学习,中学生不应该使用手机;手机时常会收到一些不良短信、诈骗短信,会对中学生的身心健康造成极大危害……

结合上述观点,运用《生活与哲学》有关矛盾的观点,谈谈你对中学生使用手机的认识。

 

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