Register
the first term of an arithmetic sequence is -2 and the fifteenth term is 68. what is the common difference of the sequence? 7 33/8 5
166k views
4 votes
the first term of an arithmetic sequence is -2 and the fifteenth term is 68. what is the common difference of the sequence? 7 33/8 5

User Mielle
by
8.0k points

1 Answer

7 votes
Hello,

Answer C : 5


u_(1)=-2\\ u_(2)=-2+r\\ u_(3)=-2+2r\\ u_(15)=-2+14r=68\\
==>14r-2=68
==>14r=70
==>r=5

User Souf Ee
by
7.9k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

What is .725 as a fraction
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)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
Link Copied!