Register
Find the sum of the arithmetic series 7+13+...+601.
118k views
5 votes
Find the sum of the arithmetic series 7+13+...+601.

User Kouk
by
7.5k points

1 Answer

1 vote

Answer:

Explanation:

d=13-7=6

Let number of terms=n

l=a+(n-1)d

601=7+(n-1)6

601=7+6n-6

601=6n+1

6n=601-1=600

n=600/6=100


s_(n)=(n)/(2) (a1+an)\\=(100)/(2)(7+601)\\=50 * 608\\=30400

User Nida Amin
by
7.2k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.2m questions

10.8m answers

Other Questions

What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
Link Copied!