已知函数f(x)=(13x+2)x2.(1)求f(x)的导数f'(x);(2)求

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问题:

已知函数f(x)=(
1
3
x+2)x2

(1)求f(x)的导数f'(x);
(2)求f(x)在闭区间[-1,1]上的最大值与最小值.
考点:导数的运算函数的最值与导数的关系
题型:解答题
计算
9
的值为(  )
A.3B.-3C.3或-3D.6
题型:解答题

以经验为标准判断心理活动是否正常有一定的局限性,因为()

A.判断者的个性不一样

B.判断者的经验和水平不一样

C.判断者的观察角度不一样

D.以上都是

题型:解答题

假如你是高二学生,叫程威,今年有机会到伦敦去学习一年。你想了解英国的一些情况,就给英国笔友Jack发了邮件,请他介绍一下。Jack根据你提的问题,做了答复,主要包括:

1. 学习上:你要来的中学是当地非常有名,通过和老师、同学交流你可很快提高英语水平;

2. 生活上:可以找一家host family,和他们吃住在一起,可以更好地了解英国人生活习惯;

3. 业余时间:游览伦敦名胜,如泰晤士河 (the River Thames)、伦敦眼(the London Eye).等;

4. 不利之处:交通拥挤。

注意:1. 可适当增添内容,使行文连贯;2. 开头和结尾,不计总词数;3. 词数:120左右。

Dear Cheng Wei,

I’m very glad to know that you will get a chance to study in London for a year. I’d like to tell you something about London so that you can have some ideas about it before you come.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                                                                                                                                                               __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

___________________________________________________________________________

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

_______________________________________________________________________________Looking forward to your coming.

Yours,

Jack

题型:解答题

订立劳动合同的劳动者,只要能保证用人单位生产经营活动的正常进行,既可以自己直接履行劳动合同约定的义务,也可以委托他人代为履行该义务。

题型:解答题

()是企业标准体系的核心。

A.技术标准

B.管理标准

C.工作标准

D.经营标准

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