First, find the common difference.a_2-a_1=5-(5+k) or -k find the difference between pairs of consecutive termsa_3-a_2=5-k-5 or -k to verify the common difference.The common difference is -k.Add -k to the third term to get the fourth term, and so on.a_4=5-k-k or 5-...
百度试题 结果1 题目【题目】T here is an arithmetic sequence below. Find the sum of all the terms in the sequence.2, 5, 8, 11, ,20,23. 相关知识点: 试题来源: 解析 【解析】100. 反馈 收藏
百度试题 结果1 题目Find the sum of the arithmetic sequence.∑_(i=1)^∑(2i-3) 相关知识点: 试题来源: 解析 =3601a_1=2(1)-3=-1 a_(20)=2(20)-3=37 20 反馈 收藏
Or the formula can be used to find the total number of terms: (35–5)÷5+1=7.结果一 题目 【题目】Given an arithmetic sequence: 5, 10, 15, ., 30, 35, find the total number of terms in this sequence. 答案 【解析】7.相关推荐 1【题目】Given an arithmetic sequence: 5, 10, 1...
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。
The 7-th term of the arithmetic sequence is: 23 Explanation:In the above exercise -The "findNthTermArithmetic()" function takes three parameters: x (the first term of the sequence), d (the common difference), and n (the term number to find). The function uses recursion to find the...
Find the specified term, given two terms from an arithmetic sequence. {eq}\displaystyle a_1 = 33 \text{ and } a_7 = -15, \text{ find } a_4. {/eq} Arithmetic Sequence: In mathematics, the sequence of numbers that have a common difference between e...
Problem 14: In an arithmetic sequence an, if a_3a_7=-16 , a_4+a_6=0 , find Sn, the sum of first n terms. 相关知识点: 试题来源: 解析 Problem 14: Solution: n(n-9)or-n(n-9). Let the common difference of the arithmetic se- quence an be d \(a_1+2d=(a_1+6d)=...
Problem 26: In an arithmetic sequence a_n=2an-1 +n. Find an in the explicit form in terms of n. 相关知识点: 试题来源: 解析 Problem 26: Solution:-n-2. Let the common difference of the arithmetic se- queneea_n=2a_(n-1)+nbed We know that n is a positive integer greater than ...
解析 The value of p is ln 3 or ln 13.结果一 题目 【题目】T hree consecutive terms in an arithmetic sequence are 3e p, 5, 3e^pFind the possible values of p. Give your answers in an exact form. 答案 【解析】T he vale of p i n3 o n3相关推荐 1【题目】T hree consecutive terms...