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....
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_...
How to find the first term in an arithmetic sequence? How to find the first term of an arithmetic sequence. find the sum of the geometric sequence 3, 15, 75, 375, _ _ when there are 7 terms. Find the indicated nth term of the geometric sequence. 6th term: a_5 = {4} / {81}...
Answer to: Find a formula for the general term, an, of the sequence. Assume that the first term in the sequence is a1. By signing up, you'll get...
Write the arithmetic sequence with first term 8 and common difference 3 . b) Check whether 100 is a term of this sequence? c) Check whether the difference of any. two terms of this sequence will be 2017. d) Find the position of the term 125 in this sequence. ...
4. In an arithmetic sequence, the first term is I and the last term is 25, The sum of all the terms in the sequence is 117. How many terms does the sequence have? 相关知识点: 试题来源: 解析 解:(117 ×2)÷ (1+25)=234 ÷26=9(项)。
in that order. What is the fifth term?( ) A.−158 B.−65 C.0 D.2720 E.12340相关知识点: 试题来源: 解析 E The difference between consecutive terms is (x−y)−(x+y)=−2y. Therefore we can also express the third and fourth terms as x−3y and x−5y. Then we can ...
Sequential Output Tracing Questions & Answers for GRE : The first term in a sequence is 1 and the second term is 5. From the third term on each term is the average (arithmetic mean) of all preceding terms.
Arithmetic Sequence:If in a sequence the difference between any two consecutive terms remains constant, then the sequence is said to be in arithmetic progression. For example, a,a+d,a+2d,a+3d,⋯ is an arithmetic sequence and in this sequence, a is ...
In sequence b1, b2, b3, ..., K is a term defined by bk = 1 / k - 1 / (k+1) for all integers k from 1 to 100. What is the sum of the 100 terms of this sequence? Find the sum of the n terms of the indicat...