解析 C。本题考查根据数列公式进行计算以及英语表达中的数学运算。将 n = 5 代入公式 an = 2n + 3,可得 a5 = 2×5 + 3 = 13。选项 A“10”是将 n = 5 代入错误公式得出的结果;选项 B“11”和选项 D“15”也不符合正确计算结果。反馈 收藏 ...
外部播放此歌曲> BZ - Formula Of A Sequence 专辑:7X 歌手:BZ 还没有歌词哦
Then the third term a3 is _. A. 4 B. 3 C. 2 D. 1 相关知识点: 试题来源: 解析 A。解析:将n = 3代入通项公式an = n² - 2n + 1,得到a3 = 3² - 2×3 + 1 = 9 - 6 + 1 = 4。B选项计算错误,C选项计算错误,D选项计算错误。反馈 收藏 ...
aAnd the contact way of material supplier is; 并且物质供应商联络方式是; [translate] awrite a recursive formula for each sequence 为每个序列写一个递归惯例 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 葡萄牙语翻译 意大利语翻译 荷兰语翻译 瑞典语翻译 ...
How do you write a recursive formula for a sequence? When we are given the first term a_1 of an arithmetic sequence, the recursive formula is given by a_n = a_(n-1) + d. What is the formula used for arithmetic sequence? An arithmetic sequence with the first term being a_1 and ...
A. the first term B. the number of terms C. the common difference D. the \(n\)th term 相关知识点: 试题来源: 解析 C。中文解析:根据文章内容,公式中\(d\)是 common difference(公差)。反馈 收藏
The Simple Arithmetic Sequences Let's say we have the simplest of arithmetic sequences. {1,2,3,⋅⋅⋅,n}{1,2,3,⋅⋅⋅,n} And what I want to think about is what is the sum of this sequence going to be? And the sum of a sequence, we already know we call a series ...
A. Sn=n(a1+an)/2 B. Sn=na1+nd/2 C. Sn=(n+1)(a1+an)/2 D. Sn=(n-1)(a1+an)/2 相关知识点: 试题来源: 解析 A。本题考查等差数列求和公式。选项 A 中 Sn 表示前 n 项和,n 是项数,a1 是首项,an 是末项。除以 2 是因为求和时首尾相加乘以项数再除以 2。选项 B 不是等差数列求...
百度试题 结果1 题目What is the recursive formula of the arithmetic sequence? ()A. T_(n-1)=T_n dB. T_n=T_(n-1) dC. T_n=T_(n-1)-dD. T_n=T_(n-1)* d 相关知识点: 试题来源: 解析 B 反馈 收藏
1) Sum Formula for a Sequence of Number 数列求和公式2) Sum of series formula 级数求和公式 例句>> 3) sum of seguence 数列求和 1. Owing to position in the mathematics of few row at senior high school and developing student\'s logic reasons ability and the reasonableness thinking level ...