精英家教网 > 高中地理 > 题目详情

【题目】判定下列函数的奇偶性.

1fx

2fx

3fx

4fx=|x+1|+|x-1|.

【答案】1非奇非偶函数2既是奇函数又是偶函数,

3奇函数,4偶函数

【解析】1fx的定义域是-∞,11,+∞,不关于原点对称,∴fx是非奇非偶函数.

2fx的定义域是{-1,1},关于原点对称,且f-1=f1=0,∴f-1=f1,且

f-1=-f1

函数fx既是奇函数又是偶函数.

3fx的定义域为-∞,+∞,关于原点对称,

fx是奇函数.

4fx的定义域为R

又f-x=|-x+1|+|-x-1|=|x-1|+|x+1|=fx

fx是偶函数.

练习册系列答案
相关习题

科目:高中地理 来源: 题型:

【题目】(地理—选修6:环境保护)阅读材料,回答问题。

红河哈尼梯田,位于云南省哀牢山南部,2013年被列入《世界遗产名录》。小龙虾是甲壳类中分布最广的外来入侵物种,为提高经济收入,当地在梯田中引进小龙虾进行养殖。后来人们发现小龙虾不仅会破坏水稻的幼苗,而且擅长在水田中打洞,动辄能打一两米深的洞穴,严重时会使田埂倒塌。

分析小龙虾大量繁殖给梯田地区带来的危害并提出应对措施。

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】 户籍人口是指在某地户籍管理机关登记了户口的人口,而常住人口则是指实际居住在某地达到一定时间的人口。下表是我国某市2012—2017年户籍人口和常住人口数量统计表。据此完成下列各小题。

2012

2013

2014

2015

2016

2017

户籍人口(万人)

1426.93

1425.14

1429.26

1433.62

1439.50

1445.65

常住人口(万人)

2380.43

2415.15

2425.68

2415.27

2419.71

2418.33

1该市最可能为

A.兰州B.上海C.重庆D.郑州

22014年后,该市常住人口增速变缓,其主要原因是

A.该市人口死亡率远大于出生率B.该市户籍人口大量外迁

C.我国中西部地区经济发展增快D.我国严格限制人口流动

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】人口“天花板”是衡量一个城市在人口暴增的压力下维持城市运转的最大数量。2016年1月,北京市提出该市2020年的人口“天花板”为2300万。据此完成下面小题。

1北京市提出该市人口“天花板”为2300万,最主要的依据是

A.淡水资源数量B.矿产资源数量

C.生物资源数量D.光热资源数量

2设定人口"天花板”对城市发展的有利影响是

A.平衡城区人口的分布B.保障市民的生活质量

C.解决人口老龄化问题D.弥补城市劳动力不足

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】 某支付平台推出线上个人碳账户“蚂蚁森林”,用户可利用绿色出行等低碳生活,在平台上积系低碳府需用攻领养虚极树,虚拟树长成后、公益组织.环保企业等蚂蚁生态伙伴们会为用户在现实世界中种植实体树。据此完成下面小题。

1具有耐严寒、耐贫瘠、耐旱的胡杨树,最适合种植在我国的( )

A.塔里木盆地B.长江三角洲C.东南丘陵D.四川盆地

2“蚂蚁森林”活动的意义主要体现在( )

①改善种植地区的生态环境 ②彻底解决我国的荒漠问题

③促进社会的可持续发展 ④增强公众的环境保护意识

A.①②③B.②③④C.①②④D.①③④

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】阅读理解

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

On November 18, 1995, Itzhak Perlman, the famous musician, came on stage to give a concert. If you have ever been to a Perlman concert, you know that getting on stage is no small achievement (成就) for him. He suffered from a disease as a child, and so he walks with the help of two walking sticks.

The audience (观众) sat quietly while he makes his way across the stage to his chair and begins his play. But this time, something went wrong. Just as he finished the first few bars, one of the strings (弦) on his violin broke. We thought that he would have to stop the concert. But he didn’t. Instead, he waited a moment, closed his eyes and then signaled the team to begin again.

Of course, anyone knows that it is impossible to play a pleasant work with just three strings. I know that, and you know that, but that night Itzhak Perlman refused to know that.

When he finished, there was a breathtaking silence in the room. And then people rose and cheered. He smiled and said—not proudly, but in a quiet attitude—“You know, sometimes it is the artist’s task to find out how much music you can still make with what you have left.”

This powerful line has stayed in my mind ever since I heard it. And who knows? Perhaps that is the meaning of life—not just for artists but for all of us.

So, perhaps our task in this fast changing, puzzling world in which we live is to make music, at first with all that we have, and then, when that is no longer possible, to make music with what we have left.

【1】What made Itzhak Perlmans performance at the concert special on November 18, 1995?

A. He just recovered from a serious illness.

B. He was late for the stage.

C. He had a quarrel with the audience.

D. His string of violin got broken.

2 Why didnt Itzhak Perlman accept the fact on the stage?

A. He was a person of pride.

B. He thought the audience didnt see that.

C. He decided to succeed with bad conditions.

D. He didnt see the string get broken at all.

3 Why did the audience stand up after the performance?

A. They were moved by his spirit.

B. They were moved by his disease.

C. They laughed at his action.

D. They wanted to relax.

4 What is the best title for the passage?

A. When you lose the most important thing

B. How can you give it up easily?

C. Playing a violin with three strings

D. Playing a violin to yourself

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】(1)将一个三棱柱的各面延展成平面后,这些平面可将空间分成几部分?

(2)将一个三棱锥的各面延展成平面后,这些平面可将空间分成几部分?

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】【2017课标33】某城市为了解游客人数的变化规律,提高旅游服务质量,收集并整理了2014年1月至2016年12月期间月接待游客量单位:万人的数据,绘制了下面的折线图

根据该折线图,下列结论错误的是()

A月接待游客逐月增加

B.年接待游客量逐年增加

C.各年的月接待游客量高峰期大致在7,8月

D.各年1月至6月的月接待游客量相对于7月至12月,波动性更小,变化比较平稳

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】(十

入冬以来全国许多地区多日被雾霾覆盖。请根据下面表格里的提示写一篇120词左右的文章,文章应包括以下内容:雾霾天气产生的原因;雾霾天气造成的影响;你的看法和建议(至少两点)。开头已给出,不进入总词数。

参考词汇:雾霾 fog and haze;排放 exhaust;电厂power station

雾霾天气产生的原因

雾霾天气造成的影响

你的看法

出行方式;

身体健康;

国家形象;

1…….

2…….

Many areas ic China have been covered by fog and haze for days in a row since winter, which causes great trouble to peoples life.

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

查看答案和解析>>

同步练习册答案