优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> 已知,请先化简,再求代数式的值:。-九年级数学
已知,请先化简,再求代数式的值:。-九年级数学
题目简介
已知,请先化简,再求代数式的值:。-九年级数学
题目详情
已知
,请先化简,
再求代数式的值:
。
题型:计算题
难度:中档
来源:四川省中考真题
答案
解:∵
,
∴
,
,
原式=
,
当时
,
原式=
。
上一篇 :
______ money,it remains to se
下一篇 :
化简,求值:,其中m=.-八年级数学
搜索答案
更多内容推荐
When I got back home, I saw a message pinned to the door“ Sorry to miss you, I will call later.”A.re
已知,x≠0,y≠0,x≠y,则=().-八年级数学
You will see the products of Liu Ling alcohol________on every avenue of Baoding city.A. advertiseB.
Mother told me ________a noise in the hall.A.don’t makeB.make not toC.not to makeD.to make not-高一英语
__________that no one enjoys__________________.A.He seems; to be looked down onB.He is seemed; being
He sent me an E-mail, _____ to get further information. A.hopedB.hopingC.to hopeD.hope-高二英语
先化简,再求值:,其中.-九年级数学
有一道题“先化简,再求值:,其中x=﹣.”小玲做题时把“x=﹣”错抄成了“x=”,她最后的计算结果是否正确_________.(填“是”或“否”)-九年级数学
先化简:,选择一个你喜欢的无理数,然后再求值.-九年级数学
先化简,再求值:-九年级数学
先化简,再求值:其中-九年级数学
Under the new policy, anyone who is found ______ in the school building will be fined $60.A.smokeB.s
All the citizens, young and old, walked and sang, beautifully _____ in new clothes of all kinds, ___
先化简,后计算:,其中.-九年级数学
Time ____ never comes again. So we’d better make full use of our time. A.losing B.lostC.being lost D
The patient was warned ________ oily food after the operation..A.to eat notB.eating notC.not to eatD
He got well-prepared for the job interview, for he couldn't risk ______ the good opportunity. A
Children above 12 are able to take part in skiing or other activities _______for them.A.designedB.de
---They are quiet, aren’t they?---yes. They are accustomed ____at meals.A.to talkingB.to not talkin
________volcanoes now for many years, I am still as enthusiastic about my job as the first day I fir
When I came in, the children pretended ________ and no one even raised their eyes.A.to readB.have re
先化简,再求值:,其中。-九年级数学
先化简,,并任选一个你喜欢的数x代入求值。-八年级数学
甲、乙两人同时从A地出发,沿同一条道路去B地,途中都使用两种不同的速度v1与v2(v1>v2),甲前一半的路程使用速度v1、后一半的路程使用速度v2;乙前一半的时间使用速度v2、后-九年级数学
_____ by the sun, they walked towards their destination through the woods.A.GuidingB.GuidedC.GuideD.
When his father came into his room, Tom pretended _______ a book.A.to read B.to have read C.readingD
计算与化简(1)(2)先化简,再求值:,其中2-八年级数学
. .To answer correctly is more important than _______ .A.a quick finishB.to finish quicklyC.finishin
Sarah pretended to be cheerful, ____________ nothing about the argument.A.saysB.saidC.to sayD.saying
已知2+=22×,3+=32×,4+=42×,…,若10+=102×(a,b为正整数),则分式=()。-八年级数学
=()。-八年级数学
When ______ different cultures, we often pay attention only to the differences without noticing the
He found himselfby a crowd of excited people and to escape.A.surrounded; tryingB.surrounding; trying
The boy, who admitted _____ in the exam, promised the teacher that he would work hard at his lessons
with the medicine shipped from China,the patient got fully recovered two days later.A.Being treated
已知实数a,b,c满足abc=﹣1,a+b+c=4,,则a2+b2+c2=()-九年级数学
化简求值:,其中正数a满足a2+a﹣1=0.-九年级数学
先化简再求值代数式:,已知:a=﹣.-九年级数学
先化简,再求值:,其中x=1+,y=1﹣.-九年级数学
The teacher asked the students __________ her _______ the word again.A.listen to; to readB.to hear;
When I got back home I saw a message pinned to the door, ______ “Sorry to miss you; will call later.
__________ the housing price, several measures have been adopted in the last two years.A.Lowering B.
计算:(1)(2)-八年级数学
化简:[+÷(+)2]·=()。-八年级数学
The 9th ASEM Summit, held in Laos in November 2012, was aimed at developing Asia-Europe cooperation
已知,则代数式=()-八年级数学
先化简,再求值:,其中,则它的值为()。-八年级数学
Chinese news reported today that a woman in Hongbai had been rescued after ____ in a tunnel for nine
I prefer ___for an outing by bike rather than __ at home on Sunday.A.go, stayB.to go, stayC.to go ,
The old man, ________ abroad for twenty years, is on the way back to his motherland.A.to workB.worki
返回顶部
题目简介
已知,请先化简,再求代数式的值:。-九年级数学
题目详情
答案
∴
原式=
当时
原式=