SOLUTION: the sum of the first twelve terms of an arithmetic sequence is 1188. if the sixth term is 89, find the first term, the common difference and the fifteenth term

Question 1083084: the sum of the first twelve terms of an arithmetic sequence is 1188. if the sixth term is 89, find the first term, the common difference and the fifteenth term
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
d, common difference
, first term of sequence

-
System of equations in the unknown variables and d:

Solve the system for the unknown variables.
RELATED QUESTIONS
In an arithmetic sequence,the sum of the first twelve terms is 156 and 4th term is 8.Find (answered by greenestamps)

The sum of the first twelve terms of an Arithmetic progression is 168. If the third term... (answered by josgarithmetic)

The ninth term of an arithmetic progression is 52 and the sum of the first twelve terms... (answered by srinivas.g)

The sum of all terms of the arithmetic progression having ten terms except for the... (answered by KMST,mananth)

the 15th term in an arithmetic sequence is 129 and the sum of the first fifteen terms is... (answered by josgarithmetic,greenestamps)

The sum of the first n terms of an arithmetic sequence is (2n^2)-n. Find the general term (answered by MathLover1)

In an arithmetic sequence of positive numbers, the common difference is twice the first... (answered by palanisamy)

the sum of the first and last terms of an arithmetic progression is 42.the sum of all the (answered by ikleyn)

Find the sum of the first 12 terms of the arithmetic sequence whos general term is an=3n+ (answered by dkppathak)