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...
The first four terms in an arithmetic sequence are x+y, x-y, xy, and x/y in that order. What is the fifth term?( ) A: -(15)/8 B: -6/5 C: DD: (27)/(20) E: (123)/(40) 相关知识点: 试题来源: 解析 EThe difference between consecutive terms is (x-y)-(x+y)=-2y. ...
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}...
Our main result is that, for certain sequences of arithmetic interest, the value of a has a significant influence on this distribution, even after removing the first term of the progressions.doi:10.1112/plms/pds055Fiorilli DanielProceedings of the London Mathematical Society...
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...
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 an arithmetic sequence, the sum of the first 15 terms is 450 and the sum of the first 20 terms is 750. Find the common difference and the first term in this sequence.. 相关知识点: 试题来源: 解析 3, 9.. The 8th term is 450÷15=30, and the 18th term is (750–450)÷(20...
The sum of the arithmetic sequence formula is the formula that provides the sum of all the terms in an arithmetic sequence. The sum of an arithmetic sequence's first n terms is given by formula. Sn=n2[2a+(n−1)d] or Sn=n2[a1+an] Here...
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. ...
first term in the sequence a 10= 2+9(3) d= common difference a 10= 29 To find the sum, we need this equation: S n= (n(a 1+a n))/2 where: n= terms of the arithmetic sequence Next is we have to substitute and compute: a 1= the ...