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Sequences & Series (id: eb72d6efc)

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admin 发表于 2024-6-2 21:25:08 | 显示全部楼层 |阅读模式
本题目来源于试卷: Sequences & Series,类别为 IB数学

[填空题]
The 1st, 5 th and 13 th terms (dq4;dzmf9x 9s6 ubgr kx,bf 7of an arithmetic sequence, with codl;,fwzzob5 tkxl .3z k6d s9;mmon difference k36zd;lbztk , wo 9x;zl 5.dsfd, $d \neq 0$ , are the first three terms of a geometric sequence, with common ratio r, $r \neq 1$ . Given that the 1 st term of both sequences is 12 , find the value of d and the value of r . r =    d =   




参考答案:
空格1: 2±2%空格2: 3±2%


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