优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> 下列计算中,不正确的是A.3+2=5B.()-2=4C.(π-3.14)0=1D.(-x)3·(-x)2=x5-九年级数学
下列计算中,不正确的是A.3+2=5B.()-2=4C.(π-3.14)0=1D.(-x)3·(-x)2=x5-九年级数学
题目简介
下列计算中,不正确的是A.3+2=5B.()-2=4C.(π-3.14)0=1D.(-x)3·(-x)2=x5-九年级数学
题目详情
下列计算中,不正确的是
A.3
+2
=5
B.()-2=4
C.(π-3.14)0=1
D.(-x)3·(-x)2=x5
题型:单选题
难度:偏易
来源:不详
答案
D
分别根据二次根式的加法、负整数指数幂、0指数幂及同底数幂的乘法进行逐一计算即可.
解:A、由二次根式的加法可知,3
,故本选项正确;
B、由负整数指数幂的运算法则可知,(
=4,故本选项正确;
C、由0指数幂的运算法则可知,(π-3.14)0=1,故本选项正确;
D、由同底数幂的乘法法则可知,(-x)3?(-x)2=(-x)5,故本选项错误.
故选D.
本题考查的是二次根式的加法、负整数指数幂、0指数幂及同底数幂的乘法法则,熟知以上知识是解答此题的关键.
上一篇 :
1、2、3、-八年级数学
下一篇 :
若在实数范围内有意义,则x的取
搜索答案
更多内容推荐
---Alice, you look puzzled, Have you understood it?---Yes.I _____another problem just now.A.l have t
Mr. Wang ____ two boys to send the sick boy to the nearest hospitalA.arrangedB.has arrangedC.had arr
Once she _______ her mind, nothing can change it.A.madeB.makeC.has madeD.will make-高一英语
(2011?舟山)计算:.-八年级数学
,π,-4,0这四个数中,最大的数是___________.-八年级数学
估计的值在A.1到2之问B.2到3之间C.3到4之问D.4刊5之问-八年级数学
(2011•泰安)下列运算正确的是()A.B.C.D.-八年级数学
下列二次根式中,最简二次根式的是()A.B.C.D.-八年级数学
_______ warmly for his work, he was too to fall asleep.A.Praising; excitedB.Praise; excitingC.Praise
What he regrets is that more than a chance .A.were given upB.is given upC.has been given upD.have be
若的平方根为,则。-八年级数学
下列二次根式中,最简二次根式是A.2B.C.D.-九年级数学
化简▲.的平方根为▲-九年级数学
This is the first time we _______ a film in the cinema together as a family.A.seeB.had seenC.sawD.ha
The fire, believed todue to illegal construction on the building’s roof, was brought under control a
Nobody likes him because he ____ lies to others.A.is always telling B.always tellsC.does always tel
(本题满分为6分)化简:-九年级数学
(本题满分10分)计算:(-3)0-+|1-|+.-八年级数学
—-Look at the timetable. Hurry up! Flight 4062 ______off at 18:20. — I will.A.takesB.tookC.will take
如果的值是【】A.0B.1C.2D.-2-八年级数学
的平方根是:【】A.2B.2C.4D.4-八年级数学
-九年级数学
— Julia, what were you doing when Anna called you?—I my housework and to take a bath.A.had finished;
Over the past decades, China _______ significantly under the correct leadership of the CPC, he said.
Miss Li ___ as a secretary for five years in the company, and now she is general manager of it.A.has
we_______a film next week.A.would seeB.seeC.are seeingD.are to be seen-高一英语
已知=555,……,观察上述各式的特点,猜想.-九年级数学
Over the past few years the cost of living _______________considerably.A.has been raisedB.has risenC
---Alice, why didn’t you come yesterday?---I ____, but I had an unexpected visitor.A.was going to B.
下列二次根式中,最简二次根式是().A.;B.;C.;D..-八年级数学
计算:的结果是___________-八年级数学
化简:-八年级数学
Had it been possible, I would have gone to attend Monica in the hospital, but Ifully occupied last m
若x、y都是实数,且y=则x+y=-八年级数学
(1)(2)-八年级数学
(1)(2)-八年级数学
若,则=-八年级数学
-九年级数学
Up to now, the family’s business ______good. I hope our good luck will continue.A.isB.wasC.will beD.
We________ up by an alarm clock every morning.A.wakeB.are wakenC.were wakenD.woke-高二英语
Nobody wants to___________ especially in public.A.make fun ofB.be made fun ofC.making fun ofD.made f
—Every now and then I get hungry for Chinese food. Let’s dine out tonight.—Forget it. My money______
—Hi, Susan, you look tired.—I ______ for months for the coming celebration for the school’s 60th ann
下列计算正确的是()A.+=B.·=C.=3D.÷=2-八年级数学
I ______ along the road when I saw Peter. So we stopped and had a chat.A.walkedB.was walkingC.would
计算:(1)(2)-七年级数学
—How was the journey?—Tiring! I caught the train at the last second but all the seats _____.I stood
My father _____ away for two months.I want to do something special for him when he comes back next w
使式子有意义的x的取值范围是()A.x>1B.x≥C.x<1D.x≥1-九年级数学
要使二次根式有意义,字母的取值范围必须满足的条件是()A.B.C.D.-九年级数学
返回顶部
题目简介
下列计算中,不正确的是A.3+2=5B.()-2=4C.(π-3.14)0=1D.(-x)3·(-x)2=x5-九年级数学
题目详情
答案
解:A、由二次根式的加法可知,3
B、由负整数指数幂的运算法则可知,(
C、由0指数幂的运算法则可知,(π-3.14)0=1,故本选项正确;
D、由同底数幂的乘法法则可知,(-x)3?(-x)2=(-x)5,故本选项错误.
故选D.
本题考查的是二次根式的加法、负整数指数幂、0指数幂及同底数幂的乘法法则,熟知以上知识是解答此题的关键.