形成性作业1答案2015

在合并同类项时,我怎么知道什么项该移动到什么地方?【例】合并同类项－xy+3－2xy+5xy－4xy－7原式=（－xy+5xy）+（－2xy－4xy）+（3－7）=-2xy－4为什么不是：（－xy+2xy）+（5xy－4xy）+（7-3） 英语翻译Givethis memory test a try.Mix up 52 playing cards.Now look at the top seven fora second.Can you remember them in order?Playersat the World Memory Championships can.In fact,the 2002 champion (冠军),Andi,memorized the order of 1196 cards 【高一数学】求第一题和第三题的解释以及第14题的做法, 高一数学第十四题,解析 合并同类项 一.已知g(x)=-x^2-3,f(x)是二次函数,且f(x)+g(x)为奇函数,当x∈[-1,2]时,f(x)的最小值为1,求f(x)的表达式二.已知二次函数f(x)=ax^2+bx+c,若a>b>c,且f(1)=0,试证明f(x)必有两个零点三.若f(x)=x^2-x-b,f(log2a)=-b,log2f(a ⒈正项等比数列{an}的公比q≠1,且a3,a5,a6成等差数列.则（a3+a5)/(a4+a6)=?⒉在各项均为正数的等比数列{an}中,若a5a6=9时,则㏒3(a1)+㏒3(a2)+……+㏒3(a10)=?⒊已知等比数列{an}中,an＞0,a1,a99是方程X²-10X 一楼，那个面积是怎么回事，还有下面你设的坐标， 如图 专家来 请讲清楚已知函数f（x）是定义在实数集R上的不恒为零的偶函数,且对任意实数x都有xf（x+1）=（1+x）f（x）,则f【f（5/2）】的值是多少? 拍得清楚的 高一数学题 拍得很清楚的忽略我的选项 已知三个正数a,b,c成等差数列,求证:1/(根号b+根号c),1/(根号c+根号a),1/(根号a+根号b)成等差数列懂了，谢 要得到y=根号2cosx,要把y=根号2sin(2x+π/4）图像如何?要不要把2先提出来 要得到y=根号2cosx,要把y=根号2sin(2x+π/4）图像如何?为什么是向右移动π/8个单位? 高一数学题、二次函数f(x)、高手进.已知二次函数f(x)满足f(x+1)-f(x)=2x且f(0)=1 （1）求f(x)的解析式 （2）当x∈[-1,1]时,不等式：f(x)＞2x+m恒成立,求实数m的范围 （3）设g(t)=f(2t+a),t∈[-1,1],求g(t)的 1,已知一个二次函数的图像通过点A（1,6）,B（2,5）,C（-1,0）三点,求这个二次函数的解析式.2,已知一个二次函数f（x）的图像顶点坐标为（1,2）,并且经过P（4,20）,求f（x）的解析式. 这段英文有什么语法错误吗?I asked you if you went with me.（我问你 你是否愿意和我走?）You anwsered that i'd rather not.(你回答 我不愿意.）I was sad(我伤心.）When you repeat one,i cried.you went alone.（当你重 这段英文有什么语法错误么?Hi,Bro!Day Dreamer's comin,I thought that u r a sunshine boy,but after my reading ur words in the space,I found another Wen who has a soft & tender heart.BTW,The girls in ur album is very pretty, 关于“二次函数”的应用题某商场以每件30元的价格购进一种商品,试销中发现这种商品每天的销售量m件（件）与每件的销售价x（元）满足一次函数m=162-3x,30小于等于x小于等于54.（1）写出商 如果正比例函数Y=KX的图像经过点(1,-2),那么k=?详细的过程 如果正比例函数y=kx的图像经过点（-1,0.5）,那么k= 正比例 函数y=kx(k≠0）的图像是经过谁和谁的一条直线；一次函数y=kx+b（k≠0）的图像时经过点谁和谁两点 Today we only have two classes.Many teachers don't have classes.Because of the 5.1 holiday will caming.we came back dormitory after the two classes.we only have three days holidaysThe holiday is too short.we cannot go anywhere.we don't have much mone 下面一段英文,请帮我指出语法错误,If I choose,I will choose novel first.My favorite novel is little prince which is a short fairy tale.Actually,I love short stories due to I don’t have much time to read in my daily life.Although the st 谁帮我改下以下这段英文的语法错误 大家进来帮我解决一道方程应用题李晶做了20道题，共得了76分，做错一道题不得分，还要扣3分，李晶做对了多少题？做错了多少题？ 已知f(x)=(mx-1)√（mx^-4mx+5)的定义域为R 求m的取值范围f(x)=(mx-1)/√（mx^-4mx+5) 英语翻译Mike is a student of Green Tree High School.He get up late this morning.So he missed the school bus.He rode his bike to the school quickly.Mike didn't look at the traffic lights,suddenly he hit a car.The car driver tllk him to hospital ri 英语翻译Laws have been written to govern the use of American national Flag,and to ensure proper respect for the flag.Custom has also governed the common practice in regard to its use.All the armed services have precise regulations on how to displ 英语翻译Plants are very important living things.Life can't go on without plants.this because plants can make food from air,water and sunlight.Animals get their food from eating plants and animals,and so on,so animals and man need plants in order 英语翻译翻译好追加50分Sorry,my lover ...I have given you my heart.Probably she is your Princess ,I should give up .But I just hope you will be happy forever.No matter what happens ,please remember ...Nothing's gonna change my love for you.