SOLUTION: Find the sum of the arithmetic series where a[1]=7, n=31, and a[n]=127

SOLUTION: Find the sum of the arithmetic series where a[1]=7, n=31, and a[n]=127

Algebra.Com

Question 460585: Find the sum of the arithmetic series where a[1]=7, n=31, and a[n]=127
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
S=n/2(a[1]+a[n])
=31/2(7+127)
=31/2 * 134
=31*67
=2,077
.
Ed
RELATED QUESTIONS
Find S(n) for the arithmetic series in which a(1)=-11, a(n)=13, and n=7. Thank... (answered by venugopalramana,fractalier)

find the sum of the first n terms of the given arithmetic series a1=-13,a7=20.8... (answered by stanbon)

find the sum of the first n terms of each arithmetic series n=18; a1=40,... (answered by checkley77)

Find the 10th term of a series in Arithmetic series, whose sum to n terms is 3n+4n2(4 n... (answered by solver91311)

Answer the following. Please show your work. 1+14+27+...+183 Step 1: Using the... (answered by Fombitz)

I'm a high school student in Algebra 2. I have a couple questions, 1. what are the... (answered by stanbon)

a. find the sum of the first n terms of the arithmetic series. b. find n for the given... (answered by venugopalramana)

Can someone please help me? 1. Find the sum of each arithmetic series. Part I: -15 + -3 (answered by josgarithmetic)

A partial sum of the arithmetic series is given. Find the sum: 3 + 5 + 7 + . . . +... (answered by ewatrrr)