2023-11-14 14:37:13
答案专期2022—2023学年/八年级第43~50期所以中位数是86+88=87,16.由题意,得化≥0解得=因为∠AFE=∠DCE,∠AEF=∠DEC,AE=DE,所以△AEF≌△DEC(AAS).(2)甲:因为样本平均...
2023-11-15 07:37:15
3+r为T1=C×x,则r=1,3,5,7时,项的次数是有理f()的旅小正周期T=4(?号)=4,所以@数,故系数为C8,C,C,C%,即8或568.-1(答案不唯-)圆0可化为(x-1)2+(y+3)2=牙子所以)a...
2023-11-15 18:08:57
14软+2+4-36」,所以k=2或或者斜率都不存在;对于D,若直线U1与:「13×(-1)-2×0+573√k2+1L2的斜率都不存在,则11∥12或11与L2方,即√32+2重合.故选C=二弓,所以直...
2023-11-16 05:05:02
(新教材)高三大一轮总复习多维特训卷数学所以A成-号A,成-名A衣,因为A,C,D三点共线,所以入-号,解得1=-9。所以Ad=2×A+号×名a,所以B励=BC+Ci=-13(2,-1)+4(3,-3)=...
2023-11-16 06:17:21
数学2023-2024学年八年级答案页第2期人教趣子习因报第5期BD=CD.16.证明:(1)如图,过点E作EF⊥2版BE=CF.AD于点F.12.2三角形全等的判定(二):.Rt△BDE≌Rt△CDF(HL)....
2023-11-16 11:57:01
自我评价☆☆☆☆☆年月日二年级数学一、填表。被除数643224除数843商98二、按要求填空。1.接着数3898后面的4个数,写下来,并把它们读出来。3898()(读作:2.下面商品...
2023-11-16 14:05:02
又ADC平面ADE,BC中平面ADE,.BC∥平面ADE,…………(2分).'DE∥CF,CF中平面ADE,DEC平面ADE,∴.CF∥平面ADE,…(4分)又BC∩CF=C,BC,CFc平面BCF,∴.平面BCF∥平面ADE,…(6分)(I)'CD...
2023-11-16 17:37:19
三、填空题:本题共4小题,每小题5分,共0分.13.若(x一a)(1+2x)的展开式中x的系数为60,则实数a=14.已知函数f(x)=+3r+x+9x2+3,且f(m)=10.则f(-m)的值为15.已知a...
2023-11-16 21:01:04
谗生用节名师导学·新高考第一轮总复习·数学第61讲随机事件的概率与古典概型【课标要求】1.结合具体实例,理解样本点和有限样本空间的含义,理解随机事件与样本点...
2023-11-16 23:07:26
第10章计数原理,概率,随机变量及其分布列学生用书则①P(μ-o<X≤μ十σ)=0.6827;②P([小结]正态分布的概率计算关键是利用数形结-2<X≤u+2o)=0.9545;③P(u-3o<合思想和...
2023-11-17 07:13:04
第十章计数原理、概率、随机变量及其分布考点三古典概型的综合应用合作探究迁移应用例3(2021河北保定期末)已知某地区甲、乙、丙6.(2022广东顺德三模)大力开展体...
2023-11-17 12:53:01
第十章计数原理、概率、随机变量及其分布第十章计数原理、概率、随机变量及其分布第一节两个计数原理、排列与组合⊙答案见586页基础达标练8.(2022辽宁沈阳二中四...
2023-11-17 20:49:25
基础题与中考新考法·八年级·上·数学15.2.2分式的加减第1课时分式的加减(共74考:单独38考,在分式的化简求值中涉及36考)教材知识知识点(①同分母分式的加减5考重...
2023-11-18 11:33:31
满分:100分由气越大的位置,压强教高三第一轮复习周涮春高三第记高三第一轮复习周测卷·数学所以20即(20a周测卷十解三角形所以(40分钟100分)在△A所以c考情分析,...
2023-11-18 13:49:00
1n(-2)为偶函教,g(x+子)=g(-x+买),故g(x)的图6.设切点坐标为(),又f(x)=2十兰,则切线斜率象关于z=平对称.而h(x)=一a(sinz十cosx)=一√Zasin((zo)2十,又b=4+an...
2023-11-30 03:35:19
Park in New York City.We're going to start at Gapstow Bridge. It is the second bridge on the site.The first,a wooden and iron bridge,designed by Jacob...
2023-11-30 05:11:23
B.State College. C.State Youth Team. 听第8段材料,回答第11至13题。 11.What does the woman do when she volunteers? A.She performs for children. B.She p...
2023-11-30 06:06:59
【答案】 One possible version: Dear Lucy, As you are extremely interested in calligraphy,I am excited to write to inform you of the calligraphy exhibi...
2023-11-30 09:42:58
C.Coaches will make plans for activities and training. D.Children can go to Tykes and Girls on the same day. 39.Which team is suitable for a girl avai...
2023-12-02 19:31:04
【答案】 One possible version: Dear Mr Smith, Having learned that the English Drama Club is recruiting new members,I am writing to you to apply to joi...
2023-12-02 20:39:15
C.Offering help. 3.What are the speakers mainly talking about? A.Writing a book. B.Using the Internet. C.Shooting a movie. 4.Why does the man decide t...
2023-12-05 01:07:21
C.By accident D.What's worse 50.A.care B.cook C.change D.read 51.A.imagined B.practiced C.suggested D.escaped 52.A.normal B,farm C.school D.factory 53...
2023-12-05 02:14:54
C House sparrows are everywhere humans are,but they aren't officially domesticated ()A new study suggests how these house sparrows have adapted to liv...
2023-09-15 17:44:53
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