Find the common difference and the first term in this sequence. 4【题目】In an arithmetic sequence ,the sum of the first 10 te rm sis 100 ,and the sum o fthe firs t20 terms is 250。Find the sum of the first 100 term sin thi ssequence....
Each successive term adds 2 to the previous term. Another arithmetic sequence has the rule B(n) = 5 + (n - 1)d, where n is the term number an d d is the common difference. If the graphs of the two sequences are parallel,what is the value of d? Explain. ...
Arithmetic Sequences Finding the nth Term - St Anne:算术序列的第n项发现-圣安妮nn,N,序列,the,nth,term,算术序列,Term,term的,The 文档格式: .ppt 文档大小: 15.5K 文档页数: 4页 顶/踩数: 0/0 收藏人数: 0 评论次数: 0 文档热度:
Find the first, second, fifth, and ninth terms of the sequence. A(𝑛) = -9 + (𝑛-1)6 Write the first five terms of the sequence, explain what the fifth term means in context to the situation. A baby's birth weight is 7 lbs. 4 oz., the baby gains 5 oz. each week. ...
Find the sum of the first 20 terms of the arithmetic sequence where the first term is 3 and the common difference is 4. A. 780 B. 790 C. 800 D. 810 相关知识点: 试题来源: 解析 C。解析:使用等差数列求和公式 Sn = n(a1 + an)/2,先求出第 20 项为 79,再计算可得和为 800。
If the first term of an arithmetic sequence is 5 and the common difference is 3, then the third term is ___. A. 11 B. 10 C. 12 D. 9 相关知识点: 试题来源: 解析 A。中文解析:首项\(a_1 = 5\),公差\(d = 3\),根据通项公式\(a_n = a_1 + (n - 1)d\),第三项\(a_...
网络释义 1. 等差数列 等差数列(arithmetic sequence):有 a1 , a2, a3, ….元素的数列,连续项的差都是一个常数,也就是:对每一个i,;例如:数列{2,5,8,11,14… wenwen.soso.com|基于247个网页 2. 等差序列 ACT考试常见数学词汇 - 豆丁网 ... arithmetic progression 等差级数arithmetic sequence等差序列ar...
北步元出她花日育结大它说节In an arithmetic sequence, the first term is 北步元出她花日育结大它说节北步元出她花日育结大它说节北
terms. Given the first term is 6, and the seventh term is 24, then the common difference of the arithmetic sequence is , and the sum of all the 15 terms is . 相关知识点: 试题来源: 解析 3;405 (24–6)÷(7−1)=3. Then the 8th term is 24+3=27. The sum of all the terms ...
In an arithmetic sequence, if the 5th term is 20 and the 8th term is 32, what is the first term? A. -4 B. C. 4 D. 8 相关知识点: 试题来源: 解析 A。解析:由通项公式可得 a5 = a1 + 4d = 20 ,a8 = a1 + 7d = 32 。两式相减消去 a1 ,得 3d = 12 ,d = 4 。将 d =...