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a(n+1)=(-an-2)/(2an+3)如何构造新数列急用 数列an中a1=0,an+1=2an+2的n次方,求an（用构造法） 《别等我落泪了你才知道我的伤悲,别等我消失了你才知道我的存在》对应的句子是什么? 习惯了存在,即使是我推开你,悄然地消失也有窒息的痛. Why didn't you give a hand to the boy I _______,but he struggled to his feet befor I tried to.为什么填 I would like to have? 求一篇写国庆60周年的文章,内容不限,体裁不限,字数不限.大伙帮帮忙了,这段时间实在是忙,没精力没时间分身乏术了.强烈支持原创,将高分奉上... why didn't you help the litter boy?oh,sorry.he had struggleed to his feet_____i ran over.a.be...why didn't you help the litter boy?oh,sorry.he had struggleed to his feet_____i ran over.a.before b.after c.until d.since选什么?为什么?谢 求一篇六十周年国庆的文章!文章内容主要包括阅兵的情景!描写得生动,让人读了有身临其境的感觉!有七八百字就可以了 You can say"He went there _____,not _____".A.on the car;by car B.on foot;in his carC.D.C.by foot;by car D.in his car;by his foot.题目来自《上海中考英语总动员》考点七-介词,可我怎么看都是B,不排除答案错误. The boy could not move because he ____ his feet填什么 各种护肤品的英文我想知道关于护肤品和化妆品的英文说法,例如爽肤水,卸妆水,粉底,遮瑕膏之类的英文要怎么讲 一篇关于“国庆60周年的小论文”偶们素初一滴,不要太长注意咧,素历史滴作业,不素政治滴先谢谢各位学长学姐嘞 请问,“问渠哪得清如许,为有源头活水来”中“为”念几声?xiexie ``` “为有源头活水来”中的“为”是读wei第几声?我们通常读第二声,但它...“为有源头活水来”中的“为”是读wei第几声?我们通常读第二声,但它是因为的意思,应该读第四声啊,到底是读第几声? Only RT.Only Stone若是连在一起呢OnlyStone，除了仅仅石头外还有别的意思吗，这2个词是不是不能这样放在一起。 设数列{an}的前n项和为Sn,已知Sn=pan+q,a1=2,a3=1/2,求p,q 英语翻译After our hair was clean,M’Dear would leave hers down,and,still in our swimsuits,we’d hang clean clothes outside to dry on the line,with me handing her clothespins out ofa small apron she had sewn for me out of flower sacks.I have a p 数列{an}的前 n 项和为 Sn,p 为常数,且满足 a1=2,Sn=4an+Sn-1-pan-1(n≥2), 又已数列{an}的前 n 项和为 Sn,p 为常数,且满足a1=2,Sn=4an+Sn-1-pan-1(n≥2), 又已知 lim S n = 6 ,则 p= ?（答案为2,求过程~谢谢!） i could be no more enjoyable than to 这样用对吗i could be no more enjoyable than to take on more challenges,对于接受更多挑战,我不能不更喜悦了,表示我是最乐于去接受挑战的, 雾霭近义词 秦皇汉武,是什么意思? 静烟雾霭的近义词是什么? the one hundredth Congress是什么意思?A low to moderate turnout is reported across the nation so far on this election day.Voters are choosing members of A low to moderate turnout is reported across the nation so far on this election day.Voters ar 英语翻译The National Park Serive in the United States will mark its one hundredth anniversary in 2016.As it nears its second century,the National Park Service plans to increase its educational programs for students and teachers.The plan includes 兀立 舒畅 快活 惊愕 的近义词 物体的沉浮关系空心物体的沉浮与密度关系与是实心物体的沉浮与密度关系有什么区别 谁有名人读书的经历或有关读书的名言?帮我找找! 女孩经常回复我没那么夸张吧是什么意思?有什么内涵吗,我应该怎么回复好? 假如我说我想你,你会怎么表现,要怎么回答才好? 翻译：even when one has all the right in the world to indulge it 我好几个问题没人回答我,我现在自己知道了,我想处理了,让问题显示完成状态,怎么弄或者我自己回答了也成 1/2+1/4+1/8+1/16+1/32.+1/1024