数学怎么把一般式变成交点式
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Isthismyclock?Isthatyourring?Arethereherbooks?Arethosehisoranges?Arethosemykeys?Isshemysister?Issheh
isheMrBrack,heisAreyouinGrade1Iaren'tAreyouworkersWeAre'tISthisyourbook?itis好吗
CanyoudoChineseKungfu?再问:谢谢,请问怎么把WuYifanlikesmakingthings变为否定句再答:WuYifandoesn'tlikemakingthings.
二次函数交点式Y=A(X-X1)(X-X2)中的x1,x2是抛物线与x轴交点的横坐标已知(1,2)(3.6)是不能用交点式Y=A(X-X1)(X-X2)如果已知抛物线上点(1,0),(3,0)可设解析
colourissoobsessed
CanIsing?再问:用肯定和否定两种回答再答:肯定:Yes,Ican.否定:No,Ican't.
以此句为例:itisadog.(主系表);helikesplaylingbasketball.(主谓宾)变为一般疑问句时,主系表结构的只需将系动词前置,其余照抄即可:isitadog?主谓宾结构的需借
1.isthatyourfootball?Yes,itis./No,itisn't.(有BE动词,而且问的是单数所以回答用it)2.Arethosehisbooks?Yes,theyare./No,t
y=ax^2+bx+c=a(x^2+bx/a)+c=a(x^2+bx/a+b^2/4a^2-b^2/4a^2)+c=a(x^2+bx/a+b^2/4a^2)-b^2/4a+c=a(x+b/2a)^2+
10.AreMrs.LiandKittyinabigshop?11.IsKittywearinghernewuniform?12.Istheboyunderthetreehungry?13.Doesh
IaSarahrunningtoyou?再答:Ishetakingpictures?再答:Aretheyplayingtogether?再答:Areyoueatinglunch?再答:Areyouca
IstomorrowWednesday?
顶点式是y=a(x-h)+k:你就把函数最高点的坐标代入即可求出,h为最高点的横坐标,k为最高点的纵坐标,完了之后再套一抛物线上的点即可交点式:y=a(x-x1)(x-x2)将抛物线与x轴的交点横坐标
一般式:y=ax²+bx+c(a,b,c为常数,a≠0)顶点式:y=a(x-h)²+k[抛物线的顶点P(h,k)]交点式:y=a(x-x1)(x-x2)[仅限于与x轴有交点A(x1
y=a(x-b)²+c=ax²-2abx+ab²+c
Isitasheep?再问:用肯定和否定两种回答再答:YesitisNoitisn't再问:回答完整了吗?
AreAmyandDickinthesameschool?
将两个交点的横坐标相加的和除以2得顶点的横坐标,将横坐标当做x的值代入函数解析式求出函数值就是顶点的纵坐标.