小学6年级数学作业本
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一道高一数学数列题设x,a1,a2,y成等差数列,x,b1,b2,y成等比数列,则(a1+a2)平方/b1b2的取值范围是多少?急,只要答案,及时的加分
等比数列中,若a1+ a2+ a3=4,a5+ a4+ a6=8,a7+a8+a9的值是多少?
数列的.设数列{an}的前n项和为Sn,已知a1=a,数列第(n+1)项=Sn+3^n,n属于正整数1.设bn=Sn-3^n,求数列{bn}的通项公式2.若数列{an}第(n+1)项大于等于第n项,求a的取值范围.
高中数列极限1题在数列中,a1=2,an=1/2 ( a + 3/a ),(n大于等于2),若liman存在,则等于_______注:a中的为下标回2楼:我已经尽力写清楚了……
五分之十二化成小数我急需呀!快!快!
趣味数学题:如何在式子0 0 0 0=24中插入运算符号和括号,让式子成立?
修建一个圆柱形的沼气池,底面直径是5m,深3m,在池的四壁与下底抹上水泥,抹水泥的面积是多少平方米?
一个圆柱形蓄水池,底面直径5m,高4m,在它的底面和内壁抹上水泥如果每平方米用水泥3kg,大约用水多少
一个圆柱形蓄水池,底面直径5m,高4m,在它的底面和内壁抹上水泥如果每平方米用水泥5kg,大约用水多少千克
-2x2y(-2xy2)2+(2xy)3×( xy2)
C3x2y-2xy2)-(xy2-2x2y),其中x=-1,y=2
3x2y+xy2-[2xy2-4x2y+(x2y-2xy2)]
若m=x3-3x2y+2xy2+3y2 n=x3-2x2y+xy2-5y3,则2x3-7x2y+5xy2+14y2等于( )若m=x3-3x2y+2xy2+3y2 n=x3-2x2y+xy2-5y3,则2x3-7x2y+5xy2+14y2等于( )空里用字母表示
|a|<1,求limn→∞[(1+a)(1+a^2)(1+a^4)……(1+a^(2^n))]
数列an的前n项和Sn=p2^n+q,其中p,q为常数且p≠0,如果an是等比数列,求limsn/sn+1的值
高中数列极限看看下面几个命题,都各自分析一下1、若lim an^2 = A^2,则 lim an=A2、若an>0,lim an=A,则A>03、若lim(an-bn)=0,则lim an = lim bn4、若lim an= A,则lim an^2= A^2
已知a的平方+4a+b的平方-6a+13=0,求3a+4b的值 要求把步骤写下来,并标明为什么 谢谢very much
已知a^2+b^2+4a-6b+13=0求a和b的值
5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2 化简,再求值
x3-2x2y+xy2-x
因式分解:x3-2x2y+xy2
(X3-2x2y+xy2)÷(x3-xy2)要求约分
五年级上册的数学试卷【人教版】
化简 5(3x2y-xy2)- (xy2+3x2y)怎么算啊
把下列各式分解因式[1] x3-xy2 [2] xy3+x4 [3] x2-3x+2 [4] x2-x-2 [5] x2+4x-5 [6] x2+4x+3[7] 6x2-7x-3[8] 2x2-3x-3 [9] 8x2+26x-15 [10] [a-b]2+11[a-b]+28 [11] ax5-10ax4+16ax3 [12] [x2-2x]2-9 [13] 8x2+26xy-15y2 [14][ 6x2-7x]2-25 [15] 3ax-3ay+xy-y2
英语智力题21、what ,by losing one eye,has nothing left but a nose?2、what turns everything around ,but does not move 3\what has a tongue ,cannot talk ,but gets around a lot?4\It is so week ,that a little wind can move it?It is so strong,that y
求2道英语智力题(1).135146 is the code(密码) for word SEASON.What's the code of word NOSE?____________________________________________________________________(2).Betty got 100 in her exam.She is over the moon about it.Read the sen
2道英语智力题(英语回答)1.I'm something that can run but can't walk.What am I? 2.How many eggs can a man eat on an empty stomach?
求两个英语智力题,谢谢!
2道(共10小题)英语智力题.一、填写下列表格中所缺的字母.1.There is a little thing.It has the number from 0 to 9.If you want to hear someone,you can come to use it.What is it?2.Which man can't live in the house?3.Which number con
3分之4x+5减去1与-的4分之5x+2互为相反数,求5分之31-2x的值
一.把多把多项数-2x^3-4x+5x^2-1重新排列:(1)按x降幂排列——————; (2)按x升幂排列——————.二.多项数a^2+2a^2b+ab^2-b^2的次数是——,项是——,是——次——项式:按a的升幂排列