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关于等差数列的问题!已知数列an满足a1=1,a2=2,a(n+2)=an+a(n+1)/2(1)令bn=a(n+1)-an,证明bn是等比数 (2)求an的通项公式 ..但如果没有了第一问的提示,直接要你求通项公式,如下面这一题a1=1,a2=2,3a(n+2)=2a(n+1)+an 求通项公式an都是一类的题,
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1.75亿学生的选择
迭代法或者相消法,我上高中时很多这种题,都差不多的
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扫描下载二维码直接证明是什么意思_直接证明在线翻译_直接证明什么意思_直接证明的意思_直接证明的翻译_英语单词大全_911查询
直接证明是什么意思
输入英文单词或中文词语查询其翻译
直接证明是什么意思 直接证明在线翻译 直接证明什么意思 直接证明的意思 直接证明的翻译 直接证明的解释 直接证明的发音
直接证明 基本解释直接证明词典：直接证明。直接证明 双语例句1. 你可以复制并粘帖命令行（最直接，但从你的手离开键盘那一刻开始就证明不是很有效率的方法），或者你可以运行&&&&You can copy and paste the line (which is, honestly, not very efficient since you need to take your hands off the keyboard), or you can run2. 2. 表1的数据也证明随着种植密度的提高，收获植株的数量下降，这是植物竞争的直接结果。&&&&This is a direct effect of plant competition.3. 相反，刑事立法的直接目的不可能是通常所提到的证明惩罚之正当性的任何东西：因为只有确定了什么行为应受法律谴责与遏制，我们才能确定我们要遏制人们实施什么样的行为，应把什么人视为我们使之遭到报应的罪犯，对什么人施以报复或[MSOffice9] 对什么人进行改造。&&&&Conversely the immediate aim of criminal legislation cannot be any of the things which are usually mentioned as justifying punishment: for until it is settled what conduct is to be legally denounced and discouraged we have not settled from what we are to deter people, or who are to be considered criminals from whom we are to exact retribution, or on whom we are to wreak vengeance, or whom we are to reform.4. 4. 相反，刑事立法的直接目的不可能是通常所提到的证明惩罚之正当性的任何东西：因为只有确定了什么行为应受法律谴责与遏制，我们才能确定我们要遏制人们实施什么样的行为，应把什么人视为我们使之遭到报应的罪犯，对什么人施以报复或对什么人进行改造。&&&&C onversely the immediate aim of criminal legislation cannot be any of the things which are usually mentioned as justifying punishment: for until it is settled what conduct is to be legally denounced and discouraged we have not settled from what we are to deter people, or who are to be considered criminals from whom we are to exact retribution, or on whom we are to wreak vengeance, or whom we are to reform.5. 5. 庆幸的是，大量可靠的证据证明抽烟和癌症有直接联系是毫无疑问的。&&&&Fortunately, mountains of reliable evidence proves the direct link between smoking and cancer beyond any shadow of6. 本文应用平面啮合原理精确设计各种非渐开线齿轮滚刀的基本蜗杆，提出并应用啮合线的投影原理从工件齿轮端截面的啮合线直接求得刀具蜗杆的端面齿形，而不必求出媒介齿条的齿形，方法很简单，还从啮合线的投影原理简明而形象地证明了一对螺旋齿轮直接啮合过程的啮合线是一条垂直于齿向的平面曲线。&&&&Most of hob design for non-involute gears are nowadays taken by approximation method. For example, the normal sectional profile of hob worm therad is usually regarded approximately as its basic rack profile. Recently, some new methods have been developed in this respect but, perhaps, they appear overelaborate since the principle of spacing engagement is based on. For this reason, the paper offers a new design procedure for hob worm based on the planar engagement principle with the intention of simplific...7. 7. 本文直接用杜德森数表示天文相角，并用它直接进行调和分析，建立了基于杜德森数的调和分析方法，并用这种方法进行了实际的调和分析，并证明了通过角速度表示天文相角的可行性。&&&&This paper directly uses Doodson numbers to express argument, and then uses the arguments to the harmonic analysis method. It sets up a method for the harmonic analysis of tides based on Doodson numbers, and then applies the method into practical situation. It has proved the feasibility of express arguments by angular8. 8. 没有材料证明，这种硬皮对苹果植株有任何直接的不利影响。&&&&There is no evidence that such crusts have any direct adverse effect on apple trees.9. 例如，被雇佣者必须证明他们受伤的直接原因是雇主的疏忽以及他们自己对生产过程中的潜在危险一无所知。&&&&For example, employees had to prove that their injurieswere ignorant about potential hazards in the workplace. CET-62003-1, Passage 2, Paragraph 210. 10. 本文用离体脑片的方法直接研究了脑脚核团-峡核投射的突触连接性质，第一次证明，电刺激中华大蟾蜍中脑Veli交叉，在峡核内胞外记录，大多数细胞呈抑制反应，少数细胞呈兴奋反应。&&&&This in vitro study on toads provides the first electrophysiological evidence that electrical stimulation of the decussatio Veli in the midbrain tegmentum predominantly produced inhibition on neurons extracellularly recorded from the nucleus isthmi.11. 直接证明的反义词11. 一般情况下，申请人需提交雇主证明书，上面应详细列明在服务期间具体从事的工作及接受的培训，这些工作和培训应与申请的职位有直接的联系。&&&&&&This is usually demonstrated with a detailed employer statement demonstrating the specific training and duties undertaken were directly related to the nominated occupation.12. TOKYO HEAD OFFICE 6-20 3 CHO-ME ，KAMIYA，KITAKU，TOKYO JAPAN FAX NO 81-3- +受益人证明：一份正本的清洁已装船海运提单及其他的单据的非议付副本已经在装船后5天内直接寄给了NITORI CO。，LTD。&&&&&&TOKYO HEAD OFFICE 6-203 CHO-ME, KAMIYA, KITAKU, TOKYO JAPAN FAX NO 81-3- +BENEFICIARY'S CERTIFICATE STATING THAT 1/3 SET OF CLEAN ON BOARD OCEAN BILLS OF LADING AND NON-NEGOTIABLE COPY OF OTHER DOCUMENTS HAVE BEEN SENT DIRECTLY TO NITORI CO., LTD.13. 它已被证明在前面几节的illocutions和含义不直接代表的语言代码。&&&&&&It has been shown in the previous sections that illocutions and implicatures are not directly represented by linguistic codes.14. 客户同意和理解，当有足够证据证明款项是任何非法行为或不良行为或产品的直接或间接性收益，和/或属于第三方，而客户没足够的理由解释，DFG保留权利退款/送回汇款人所收到的在A）和B）中任何款项。&&&&&&Client agrees and understands that DFG reserves the right to refund/send back to the remitter any amounts received under sections A and B of this paragraph, having sufficient proof that these amounts are direct or indirect proceeds of any illegal act or omission or product of any15. 客户同意和理解，当有足够证据证明款项是任何非法行为或不良行为或产品的直接或间接性收益，和/或属于第三方，而客户没足够的理由解释，丹迪保留权利退款/送回汇款人所收到的在A）和B）中任何款项。&&&&&&Client agrees and understands that Dandy reserves the right to refund/send back to the remitter any amounts received under sections A and B of this paragraph, having sufficient proof that these amounts are direct or indirect proceeds of any illegal act or omission or product of16. 这个位相改变可以直接用罗埃镜的实验加以证明。&&&&&&A This phase change can be demonstrated directly with an arrangement called L s mirror.17. 文摘：用比较直接的方法证明幂级数的和函数在收敛域内可以逐项微分的公式；并得到了计算傅立叶系数的一种简便方法。&&&&&&A relatively direct method is expounded in this paper to prove the termwise differentiation of power series, and a simple method is expressed to calculate the Fourier coefficient.18. 911查询·英语单词18. 从他们创作的具体作品来看，有些片段或情节直接或间接模仿中国的《西游记》等小说，如《洪吉童传》、《玉楼梦》等汉文小说中的缩地术和分身术等，这些都有力地证明中国神魔小说对朝鲜汉文小说的影响。&&&&&&Korean men of letters were fond of this literary form which combines affairs of human life, history and heroic legend into a whole entity, so they learned from this writing style consciously or unconsciously and blended many of their properties into their own.19. 19. 一个可能是设立这个角色，忽略建议和把这个视为另外技术项目的内容，为了证明这个解释类推，人们在建房子的时候会采用建筑师的蓝图和视察交易――用另外的话说就是，自己承担总承包商和设计师，那些有直接经验的人可能会成功。&&&&&&One opti to ignore the advice here and treat this as just another technical project. To return to the construction analogy, there are people who can take an architect's blueprints and oversee tradesmen in building a house - in other words, fill the role of general contractor and architect themselves. Those most likely to succeed are those with direct experience.20. 基于trie树形结构提出DL-safe~L之上的节点扩展算法，无需事先生成候选模式，可以直接通过计算容许谓词集而生成频繁Web访问模式和关联规则；巧妙地利用选言数据库中被证明的优化原则，通过语义等价模式以及模式分类冗余检查有效避免了过多逻辑推理所带来的算法性能瓶颈。&&&&&&Based on trie tree, a node explanation algorithm is presented to directly generate the frequent Web access patterns and association rules by computing admissible predicates. This method ingeniously makes use of the optimized principle in disjunctive database, and check whether a pattern is semantically free or taxonomy redundancy to avoid the algorithm performance bottleneck caused by too much logic reasoning.直接证明是什么意思,直接证明在线翻译,直接证明什么意思,直接证明的意思,直接证明的翻译,直接证明的解释,直接证明的发音,直接证明的同义词,直接证明的反义词,直接证明的例句,直接证明的相关词组,直接证明意思是什么,直接证明怎么翻译,单词直接证明是什么意思常用英语教材考试英语单词大全 (7本教材)
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&2017 　京ICP备号-6　京公网安备30　知识点梳理
递推公式：如果数列{an}的第n项与它前一项或几项的关系可以用一个式子来表示，那么这个公式叫做这个数列的递推公式。用递推公式表示的数列就叫做递推数列比如等比数列An=A1*q^（n－1）可以表示为：An=q*An-1
所谓归纳推理，就是从个别性知识推出一般性结论的推理。归纳推理包括完全归纳法和不完全归纳法。&归纳推理的例子：归纳法的应用：&（1）证明恒等式；&（2）证明；&（3）；&（4）计算、猜想、证明。
整理教师:&&
举一反三（巩固练习，成绩显著提升，去）
根据问他()知识点分析，
试题“已知数列{an} 中，a1=1，an+1=2an+1．（1）...”，相似的试题还有：
已知数列{an}满足a1=2，且anan+1+an+1-2an=0(n∈N+)．(1)求a2、a3、a4的值；(2)猜想数列{an}的通项公式，并用数学归纳法加以证明．
已知数列an满足a1=1，且4an+1-anan+1+2an=9(n∈N*)(1)求a1，a2，a3，a4的值；(2)由(1)猜想an的通项公式，并给出证明．
已知数列{an}满足a1=1，且5an+1-2anan+1+3an=8(m∈N*)．(Ⅰ)求a2，a3，a4的值；(Ⅱ)猜想{an}的通项公式，并用数学归纳法证明你的猜想．}