p是共焦点椭圆和双曲线一个交点角F1pF2=兀/3求它们离心率的倒数之和的最大值

“化简并求值:1/a+根号1/a的平方;+a的平方-2,其中a=1/5",甲,乙两人的解答不同.甲的解答是1/a+根号1/a的平方;+a的平方-2,=1/a+根号（1/a+a）的平方=1/a+1/a-a=2/a-a=49/5； he is taller than ____ ____ in his class =_______ ________is taller than he in his class x→无穷大时求shx/chx＝? 3(2X+Y)+(2(2x-Y)=6 (8X+4y)-(10X-5Y)=2 二分之一X－三分之二Y=-1 3x-4y=-6 2x+y=3 8x+4y=12 两式相加 3x+8x=-6+12 x=6/11 y=3-2x=3-12/11=21/11最后一步的12/11是怎么来的? Amy often chats with me under the tree at school的同义句（ ） and ( ) often ( ) under the tree at school He often chats on the phone with his friend.(用at the moment改写) He often watches her duaghter ( )with her friend.A.dance to B.danceC.dancing D.danced (6-2x)(4y-y^2)=0怎么解 went,we,to,sunday,the,day,the,yesterday,before怎样连成句子? chx,shx换算公式有那些 chx,shx 具体是什么,还有他们之间的运算,求导等等 货车从甲地开往乙地,15小时可以到达.客车从乙地开往甲地,10小时到达.如果两车从两地相对开出,相遇时客车距甲地还有240千米.甲、乙两地相距多少千米?（请用算式解, At l________,we often sit under the tree.We always c_______ with each other. After class we like sitting under the tree and chat with each other.哪里错了?chat应该该为什么? 哈姆雷特是戏剧还是小说 请高手提供下戏剧“哈姆雷特”的英文摘要 创作了《哈姆雷特》等著名戏剧的文学巨匠是 一辆客车从甲地到乙地要行10小时,货车从乙地到甲地要行15小时,两车分别从两地同时相向而行,相遇时客车比货车多行150千米,甲、乙两地相距多少千米 You must return the book on time改为同义句 You must ?the picture book on time Ok,I will A return back B get back C give back D take back快哦 英语十六种时态的基本形式. 英语基本时态关键词是什么?急啊 怎样才能增大英语的词汇量 扩大词汇量英语怎么扩大英语词汇量呢 感觉一做阅读理解 完形填空就发懵 好多单词都不认得 书本里的有在背了 但是 还是有很多课外的 怎么样扩大英文词汇量呢? 据调查,我市某公司的30名职工的工资如下.董事长 1人 7000元经理 4人 3000元职员 20人 1800元 临时工 5人 700元中位数怎么算, You must return the library book on time. You must ____ ____the book on time. 改写句子 企业本月工资费用分配如下,生产工人工资10万元,车间管理人员工资5万元,行政管理人员工资8万元,销售部门人员工资7万元,做分录, she runs faster than ____ in her class . she runs faster than you (同义句)怎么改? A :She runs fastest in her class.B:____ ____ ___ ___ she in her class.