# Arithmetic Sequence

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• November 19th 2008, 02:00 PM
civiliam
Arithmetic Sequence
Find the first 4 terms of an Arithmetic Sequence with 7th term of 18 and the common difference is 3/2

not exactly sure how to do this thanks in advance
• November 19th 2008, 02:10 PM
skeeter
$a_n = a_1 + (n-1)d$