优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> (2011重庆綦江,21,10分)先化简,再求值:其中x=-八年级数学
(2011重庆綦江,21,10分)先化简,再求值:其中x=-八年级数学
题目简介
(2011重庆綦江,21,10分)先化简,再求值:其中x=-八年级数学
题目详情
(2011重庆綦江,21,10分) 先化简,再求值:
其中
x
=
题型:解答题
难度:偏易
来源:不详
答案
:解:原式=
=
=
当
x=
时,原式的值为
略
上一篇 :
---- Look! Everything here i
下一篇 :
(2011山东泰安,7,3分)下列运算正确
搜索答案
更多内容推荐
I heard that he ________ for three days. Do you know if he is better now?A.fell illB.had fallen illC
---- Can I borrow your car?---- Sorry. My car __________ at the garage.A.is being repairedB.is repa
—Can you give me the right answer?-─Sorry I____________ .Would you repeat the question?A.hadn’t list
在函数中自变量的取值范围是。-九年级数学
—Have you moved into the new school?—Not yet, the classrooms________.A.are being paintedB.are painti
Hurry! The train _______. You know it _____at 8:30am. .A.leaves; leavesB.is leaving; leavesC.leaves;
She _____ as the first lady of Republic of Korea instead of her mother for five years when her fathe
(2011四川宜宾,17⑵,5分)先化简,再求值:,其中.-八年级数学
(2011四川成都,17,8分)先化简,再求值:,其中.-八年级数学
(2011内蒙古乌兰察布,13,4分)则=-八年级数学
满足整数对(x,y)的个数是[]A.多于3个B.3个C.2个D.1个-九年级数学
This time next week I __________ to Guangzhou to attend a meeting with my manager.A.will flyB.am fl
– Shall we go out for lunch?– Don’t disturb me. I ______ the letters all morning and ______ six so f
计算的结果是.-八年级数学
Going on holiday not only __________you feel good while you’re there --- you reap the health benefit
With the help of high technology, more and more substances _________ in the past years.A.discoveredB
---- My leg hurts a lot----You'd better go to the doctor and have it ____.A.examinedB.being ex
Mary went to the box office at lunch time, but all the tickets __________ out.A.would sellB.had been
(2011江苏泰州,20,8分)解方程组,并求的值.-八年级数学
(2011山东日照,15,4分)已知x,y为实数,且满足=0,那么x2011-y2011=.-八年级数学
已知,则x-的值等于()。-九年级数学
.Her pale face suggested she____ill,and our suggestion was that she_____to see a doctor.A.was,goB.be
I wish you hadn’t given him my telephone number, but you.A.didB.hadC.doD.have-高二英语
函数中自变量的取值范围是_______________.-九年级数学
—— Can’t you notice the person shaking hands with the leader? He is our classmate Tom! —— Oh, my God
---- Housing prices are likely to stop rising because the governments at all levels ______a combinat
---Did you watch the movie Tangshan Earthquake last night?---I had planned to, but it ___ hard all t
(2011江苏苏州,21,5分)先化简,再求值:(a-1+)÷(a2+1),其中a=-1.-八年级数学
(2011山东济宁,5,3分)若,则的值为()A.1B.-1C.7D.-7-八年级数学
(2011四川内江,6分)已知,则.-八年级数学
(2011山东滨州,2,3分)若二次根式有意义,则x的取值范围为()A.x≥B.x≤C.x≥D.x≤-八年级数学
Great changes __________ in this city over the past five years.A.took placeB.have been taken placeC.
化简:______.-八年级数学
By the time I arrived at the airport, she_____ for New Zealand.A. would be leaving B has left C will
-- Why didn’t you come to see the film with your parents last weekend? -- I _____ my lessons for the
Shestaredatthepainting, wonderingwhereshe______it. A.sawB.hasseenC.seesD.hadseen-高一英语
(2011江西,17,6分)先化简,再求值:()÷a,其中a=.-八年级数学
(2011山东日照,18,6分)化简,求值:),其中m=.-八年级数学
More than one teacher ____ thought _______ of the boy.A. has; highly B. have; highly B.has; high D.
The gasoline _______. Let’s fill the car up at the next gas station.A.is running out B.has run outC.
(2011山东德州12,4分)当时,=_____________.-八年级数学
(1)(2)-九年级数学
Energy drinks are not allowed _______ in Australia but are brought in from New Zealand.A.to makeB.to
.2+-4-九年级数学
Our food ________ .So we’d better go home to fetch some.A.has run outB.had run outC.is run outD.has
已知,,试求的值。-九年级数学
Since you have made so little progress in English, I____you ___ a new learning method next term.A.wi
9的算术平方根等于()A.±3B.-3C.3D.81-八年级数学
在二次根式:①;②;③;④中,与是同类二次根式的是()A.①和③B.②和③C.①和④D.③和④-八年级数学
The population of the province to more than twice what it was in 1949. The figure is now approaching
返回顶部
题目简介
(2011重庆綦江,21,10分)先化简,再求值:其中x=-八年级数学
题目详情
答案
当x=