首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
已知∣x-a∣﹤,∣y-b∣﹤,求证∣(x+y)-(a+b)∣﹤c.
查看本题答案
包含此试题的试卷
教案备课库《初二年级贯通班数学学案22》真题及答案
点击查看
你可能感兴趣的试题
已知曲线C://y=x2与直线lx-y+2=0交于两点AxAyA和BxByB且xA<xB记曲线C在点
第一象限的圆弧的起点坐标为Axaya终点坐标为Bxbyb用逐点比较法插补完这段圆弧所需的插补循环数为
有下列命题①若p=xa+yb则p与ab共面②若p与ab共面则p=xa+yb其中真命题的个数是.
1
2
3
4
已知xAg+yBgzCg△H=a将xmolA和ymolB混合在密闭容器中在不同温度T1>T2及压强P
x+y=z;a>0
x+y>z;a<0
x+y
x+y
0
已知|x|
在地形图上量得AB的坐标分别为xA=432.87myA=432.87mxB=300.23myB=30
315°
225°
150°
300°
已知AB两点的坐标差XB-XA=-0.5mYB-YA=+0.5m则直线AB的坐 标方位角αAB为45
已知直线AB且YA<YB则直线AB正反方位角之间的关系为
aAB=aBA+180°
aAB=aBA-180°
aBA=aAB+180°
aAB=aBA±180°
已知X与Y的相关系数rxy=0.38A与B的相关系数rAB=0.58rXY与rAB均在0.01水平上
r
XY
与r
AB
的差异在0.01水平上具有统计学意义
r
XY
与r
AB
的差异不具有统计学意义
r
XY
与r
AB
的差异是否具有统计学意义无法推断
r
AB
要比r
XY
更显著
已知XA=100.00YA=100.00XB=50.00YB=50.00坐标反算aAB=45°00′
已知a=34b=43求xy的值使xa+yb⊥a且|xa+yb|=1.
第一象限的圆弧的起点坐标为AXaYa终点坐标为BXbYb用逐点比较法插补完这段圆弧所需的插补循环数为
已知XA=50.00mYA=40.00mXB=50.00mYB=60.00m根据下图数据求出CDEF
计算题已知AB两点的坐标分别为xA=100YA=200xB=10YB=20求AB两点之间的水平距离及
在地形图上量得AB的坐标分别为XA=432.87mYA=432.87mXB=300.23m YB=3
187.58
733.10
132.64
1257.12
已知AB两点的坐标值分别为XA=5773.6332mYA=4244.0980mXB=6190.495
52°57′32″、2515.361米
52°31′57″、2515.361米
52°32′57″、2515.316米
52°32′57″、2515.361米
设XA=57175.3mYA=18160.1mXB=57345.0mYB=18364.5m则AB两点
265.66m
250.20m
已知A点坐标XA=500mYA=200m直线AB的距离DAB为1000mαAB=30°求B点的坐标X
已知AB两端点的坐标值xA=1yA=1和xB=2yB=2试求直线AB的象限角
已知ab是正数且a+b=1求证ax+bybx+ay≥xy.
热门试题
更多
—Englishislikea.ItmakespeopleintheEastandWestunderstandeachother. —You'reright.It'sreallyimportantforustolearnitwell.
LilyLucymaygowithyoubecauseoneofthemmuststayathome. A.Notonly;butalso B.Neither;nor C.Both;and D.Either;or
Ithinkyoushouldcomplainofcourseyouarehappywiththesituation. A.unless B.however C.until D.though
carefullyMichael!There'saschoolahead.A.Drive B.Todrive C.Drove D.Driving
—sweetmusic! —AndIreallylikeSing! ChinaTVprograms. A.What B.Whata C.How D.Howa
—Excuseme.I'mlookingforBetheBestofYourself. —Sorry.Thebookyouaskforout. A.isselling B.issold C.wasselling D.willbesold
Someleft-behindchildrenwillfeellonelyandhappyaftertheirparentsmovetothecitytowork.
MrJiangwantedtobuyarobotinordertomakehislifemucheasy.
—DadI'mtootiredtowalkanyfurther. —Don’t.Wecanreachthetopofthemountainifwekeepit. A.giveoff B.giveup C.givein D.keepup
Hewasalwaysabsentclassesandthatmadetheteacherangry.
—willyouflytoBeijing? —Intwodays. A.Howsoon B.Howmany C.Howoften D.Howlong
—Couldyoutellme? —“Romewasnotbuiltinaday.”Youshouldtrytogiveitenoughchancestobecomestrong. A.whatIcandotohaveagoodmemory B.howIcandotohaveagoodmemory C.whyIshouldhaveagoodmemory D.howcanIhaveagoodmemory
moreaboutChinesecultureJackhasdecidedtotakeChinesefolkmusicashissecondcourse.A.Learn B.LearnedC.Tolearn D.Tobelearning
—WheredoSmithsspendtheirweekends? —Theyoftengotoplayonsamebeach. A.the;the B.a;the C.the;an D.a;an
I'mafraidofthedarksoIgotosleepmybedroomlighton.
—MissGaocouldyoulendmethebookyoutalkedaboutinyourclassyesterday? —Sure. A.which B.what C.who D.where
It'sforustopointatotherswithchopsticks.
NobodyhelpedMikemakethepaperplaneandhemadeitby.
Allthestudentsknowcheatingintheexamisnotallowed. A.need B.may C.must D.can
Thetwenty-fourWinterOlympicswillbeheldinBeijingin2022.
—Excusemecouldyoupleaseshowmehowtousethisnewmobilephone?—.A.Certainly!It'shere B.YesyoucanC.Surewithpleasure D.That'sallright
Howclevertheboyis!Heturnedthewasteintoboxesindifferentshape.
—I'mverynervousthenightbeforethebigexam. —.I’msureyoucanmakeit. A.Takeiteasy B.Takeyourtime C.Goahead D.Enjoyyourself
Airpollutionhasbecomethaneverbefore.Wemustdosomethingtostopit. A.serious B.moreserious C.mostserious D.themostserious
ThisistheschoolIstudiedthreeyearsago. A.where B.when C.that D.which
—BillcanIgetyouanythingtodrink? —Thanks.. A.Youarewelcome B.Itdoesn’tmatter C.Noproblem D.Iwouldn'tmindacoffee
Thereaclassmeetingtomorrow.Pleasegettotheclassroomontime. A.is B.willhave C.will D.willbe
Don’tputwhatyoucandotodaytilltomorrowandyoumustfinishyourhomeworktoday.
Practiceplaythepianoeverydayandyoucanbecomebetteratit.
Youshouldatthedoorbeforeyouentertheteachers'office.
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
高一上学期物理
教案备课库
教案备课库
教案备课库