直线l经过抛物线y2=4x的焦点F，且与抛物线交于A、B两点，若向量AB=6向量FB，则直线l的斜率

一道数学题……求解……简单……但是麻烦12345678910111213141516这16个数字 把他们在4乘4的方格里写下使每横排竖排斜的数字之和相等他们之和为34 谁有钟书金牌九年级上数学课课练p28、29、30、31的答案!急啊!谢谢了,帮忙解决!麻烦快点回答好吗?!求求你们了!加悬赏的 钟书金牌教辅上海版9年级数学课课练（封皮蓝）求答案从统计初步练习(AB)(p128-136) 越快越好 最好17号之前.......全部答案也行 设函数y=f(x)在点x0处可导,且f'(x0)=a,则lim△x→0 f(x0–2△x)–f设函数y=f(x)在点x0处可导,且f'(x0)=a,则lim△x→0 f(x0–2△x)–f(x0)/△x 为什么? 第一题：若0函数y =f( x)在x=0处可导,则lim△x趋向于0 f(x0+2△x)-f(x0)/△x=?第二题：设函数f(x)在x=a处可导,且f(a)=A,则极限lim趋向于0 f(a+3△x)-f(a-△x) / 2△x=? 请马上给我答案,要详细的过程如图,CD是圆O的直径,BE是圆O的弦,DC,EB的延长线相交于点A.若∠EOD=75°,AB=OC,求∠A的度数 （要有过程）谁能给我答案? 人体的小肠表面积是多少? 甲,乙,丙,丁,四人合作加工一批零件,甲加工是其余三人加工的2分之1,已加工是其余三人的3分之1,丙加工是其余三人的5分之1,丁加工了30个,这批零件共多少? 已知圆内接四边形ABCD的边长分别为AB=2,BC=6,CD=DA=4.求四边形ABCD的面积.大致图像应该是这样的. 在三角形ABC中,若(a3+b3-c3)/(a+b-c)=c2,且sinAsinB=3/4,判断三角形的形状. 已知x^2+y^2=1 求3x+4y的最小值? 已知X^2+Y^2=1,求3X-4Y的最小值 求详解.如果用x2+y2=1是圆，3x-4y与他相切的方法做呢？ 2x+1的绝对值≤3 要画数轴和函数图像 把67.5度化成弧度 5/6弧度化成度5/6 弧度化成度2,各 -1.5 为第几象限角5/6弧度化成度2,各-1.5为第几象限角 I doubt _____is a doctor Awho of you B.which of you C.whom of you D.whoever of you 我不明白为什么不能用who of you呢?宾语从句中不是可以用who引导的吗?这道题不是指的也是‘人’吗?那为什么还得用which啊 2.It's 1.who did the manager ___the report /A.have B.have write C.have writes D.have to wrte2.the house which he bought in 1999,_____he sold two years later ,is again on the market.A.and that B.which C.and which D.when为什么第二题选c 才而不是b 若x^2+y^2=1,则3x-4y的最小值是 若函数f(sinx)=cos2x,则（cos15°）= 已知函数f(sinx)=cos2x+sinx,求（1）f(cosx) （2）f(sinx)+f(cosx)的最大值与最小值 怎么测量人体表面积不用具体数值, 关于余弦定理的数学题在∆ABC中,若sinA+sinB+sinC要过程 1.The CDs are on sale!Buy one and you get ____ completely free.A.others B.one2.---Do you mind my opening the window?It's a bit hot here.---______,as a matter of fact.A.Go ahead B.Yes,I do第二题这样的一般不都选a吗？有什么讲不通的 问两道高中英语题目,求详解1、I am surprised that you should have been fooled by such a____ trick.A.ordinary B.easy C.smart D.simple 2、The little boy walks___he __an old man.A.as if;likes B.as though;were C.even if;likes D.even though;we 1.I think you're___carelesness in your exams.A.to go on B.to get rid of C.to get rid D.getting rid of2.It seems as if we___to walk home.A.have B.had C.will have D.shall have all the people _____the meeting were very important.Aattending Bpresent C attend D presented 选A 为什么用ing的形式 attend 和present 有什么区别吗——— they heard the shout for help,they rushed out.A on the moment B The moment C at t I will go shopping tomorrow afternoon if I______my work ahead of time.A.finished B.have finished C.am finishing D.will finish我想问下为什么不选A,IF引导的从句虚拟语气表将来不是应该用过去时吗、You can borrow books from th Which of the following CANNOT be a root of a polynomial in x of the form 9x^5+ax^3+b,where a and b are integers?(a)-9 (b) -5 (c)1/4 (d)1/3 (e)9 Find propositions in disjunctive normal form which have the following truth tables Which of the following weak form is WRONG?A.When shall we meetB.what shall we take to the school sports meet?C.We’ll take our sports clothes and sports shoes.D.What is he looking at? which form of the following sentances is correct the salary of women teachers` doesn`t equal the men teachers` in some countriesthe salary of women teachers doesn`t equal the men teachers` in some countriesthe salary of women teachers doesn`t equal t