1. The first term of an arithmetic sequence is 3 and the 20th term is -54. What is the common difference of the sequence?

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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1. The first term of an arithmetic sequence is 3 and the 20th term is -54. What is the common difference of the sequence?  2.Find the common difference of 1/3 , 2/3 , 1 , 4/3 .  3.Given a4 = -10 , a5 = -16 and d = -6 , find the first term. * 4.If three arithmetic means are to be inserted between 3 and 63, what is the second arithmetic mean? *
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