解析 B N/A. 反馈 收藏
百度试题 结果1 题目【题目】In an arithmetic sequence, what is the relationship between the second term + eighth term and the fourthterm+sinthterm? 相关知识点: 试题来源: 解析 【解析】a_2+a_8=a_4+a_6 反馈 收藏
but it’s really pretty simple. An arithmetic sequence is a sequence of numbers where the difference between any two successive elements is always the same constant value. For example, the sequence of years since the start of the new millennium is an arithmetic...
An arithmetic sequence is a list of numbers in which consecutive terms differ by a constant amount, the common difference. When the common difference is positive, the sequence keeps increasing by a fixed amount, while if it is negative, the sequence decreases. Other common sequences are the ge...
If the terms of a sequence are t1, t2, t3, . . . , tn, what is the value of n ? (1) The sum of the n terms is 3,124. (2) The average (arithmetic mean) of the n terms is 4. 选项: A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. ...
解析 A。解析:设首项为 a1,公差为 d。由 a2 = a1+d = 8,a5 = a1+4d = 17。将第一个式子变形为 a1 = 8 - d,代入第二个式子可得 8 - d + 4d = 17,3d = 9,d = 3。选项 B,4 计算错误;选项 C,5 计算错误;选项 D,6 计算错误。
百度试题 结果1 题目The numbers below follow the arithmetic sequence,what is the 13th number? 根据以下的等差数列,问第13个数是什么? 123、120、117、114、111、⋯相关知识点: 试题来源: 解析 87. 123−(13−1)×3=87. 反馈 收藏
1. To be coherent or intelligible: an explanation that made sense. 2. To be practical or advisable: It makes sense to go now. make something of To start a fight or quarrel over. make the grade To measure up to a given standard. make the most of To use to the greatest advantage. ...
User interface (UI) testingverifies the behavior of an application's user interface. UI tests help verify that the sequence, or order, of user interactions, leads to the expected result. These tests also help verify that input devices, such as the keyboard or mouse, affect the user interfa...
看到了几题有趣的英语数学题 并说一下做题思路 For each positive integer n ,the mean of the first n terms of a sequence is n .What is the 2008th term of the sequence 答案是4015 Vertex E of equilateral 三角形ABE is in the interior of unit square ABCD .Let R be the region consisting ...