式子比较复杂,就不写了.题目是首先让我化简,然后.我就看不懂了.3.大标题是find 小题目是the ternth term of an arithmetic sequence when its first term is 3 and the common difference is __?完全没看懂4.find the area of the following figures:是不是说求下列图形的面积?5.divide:x^3+7x^2-11x...
Mathematical Formula: The nth term of an arithmetic sequence is given by x + (n-1) * d. Recursive Approach: Instead of using the formula directly, recursion is used to find each term step by step.Hints (Try Before Looking at the Solution!)Here are some hints to help you solve the...
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
百度试题 结果1 题目 12. The first four terms of an arithmetic sequence are21 17 13 9Find, in terms of n, an expression for the nth term of this sequence.-4n+25(Total 2 marks) 相关知识点: 试题来源: 解析 -4n+25 反馈 收藏 ...
Common difference ( d ) which is calculated as d = a2– a1= a3– a2= ……. = an– an – 1 the nth term of the arithmetic sequence Sum of first n terms ( Sn) The arithmetic sequence can also be written in terms of common difference, as follows – ...
MathCalculusSequences Find the first three terms of the sequencean=(−3)sin((2n+1)n/2)/(n+1)!. Question: Find the first three terms of the sequencean=(−3)sin((2n+1)n/2)/(n+1)!. nth Term and Sequence: bn
The sequence will either converge or diverge. Answer and Explanation: Here, are the first five terms of the sequence: {eq}a_n = \frac{(-1)^n x^{2n +1}}{(2n +1)!}\\ a_1 = \frac{\left(-1\right)^1x^{2\cdot...
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。
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 5-2ka_5=5-2k-k or 5-3ka_6=...
Arithmetic sequences, the pattern of progressing numbers, can be classified by finding the difference between numbers in the sequence and then notating them into a formula. See the process of the two standard formulas used, as well as how to find them using terms. ...