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∵一组数据a1,a2,…an的方差为4,∴这组数据的标准差是 4=2,根据两组数据之间是一个倍数关系时,这组数据的标准差也是这个倍数之间的关系,∴3a1-1,3a2-1,…,3an-1的标准差是3×2=6故答案为:6 根据所给的一组数据的方差,开平方求出标准差,根据根据两组数据之间是一个倍数关系时,这组数据的标准差也是...
对于数列{an},定义{Δan}为数列{an}的一阶差分数列,其中Δan=an+1-an(n∈N*) (Ⅰ)若数列{an}的通项公式求{Δan}的通项公式; (Ⅱ)若数列{an}的首项是1,且满足Δan-an=2n, (1)证明数列为等差数列; (2)求{an}的前n项和Sn试题答案 在线课程 答案:解析: 解:(Ⅰ)依题意 (3分) (Ⅱ)(...
a(n+1)=2an²两边取对数得lna(n+1)=ln2+2lnan所以lna(n+1)+ln2=2(lnan+ln2)所以数列{lnan+ln2}是等比数列首项是lna1+ln2=ln1+ln2=ln2公比是q=2所以lnan+ln2=ln2*2^(n-1)即ln2an=ln[2^2^(n-1)]所以2an=2^2^(n-1)... 解析看不懂?免费查看同类题视频解析查看解答 ...
(CRMP1) acts as an invasion and metastasis suppressor of prostate cancer via its suppression of epithelial–mesenchymal transition and remodeling of actin cytoskeleton organization G Cai1,4, D Wu1,4, Z Wang1, Z Xu1, K-B Wong2, C-F Ng3, FL Chan1 and S Yu1 The cancer cells can ...
This invention provides methods of performing nucleic acid hybridization assays on high-density substrate-bound oligonucleotide arrays involving including in the hybridization mixture an isostabilizing agent, a denaturing agent or a rena... MT Cronin,Miyada, Charles Garrett Trulson Mark Gingeras Thomas ...
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A B-CELL SPECIFIC IMMEDIATE-EARLY HUMAN GENE IS LOCATED ON CHROMOSOME BAND 1Q31 AND ENCODES AN ALPHA-HELICAL BASIC PHOSPHOPROTEIN RW Deed,J Newton,E Mitchell,... - 《Journal of Cellular Biochemistry》 被引量: 0发表: 1994年 Cyclooxygenase is an immediate-early gene induced by interleukin-1 ...
在淘宝,您不仅能发现适用于LG电视蓝牙语音遥控器AN-MR21GA MR21GC AKB76036509 43NANO75 55UP75006LF OLED55A1RLA (Movies)的丰富产品线和促销详情,还能参考其他购买者的真实评价,这些都将助您做出明智的购买决定。想要探索更多关于适用于LG电视蓝牙语音遥控器AN-MR21GA
11.Finally I got my driving license last summer.Mom decided to go with me to take my first trip around an empty parking lot.I knew my mother was an excellent (31)D.She had drivenover 20years without getting one ticket.However.I found that she was no