A geometric sequence is given. Find the common ratio and write out the first four terms.{sn} = {3n}

A. r = 3; s1 = 3, s2 = 6, s3 = 9, s4 = 12
B. r = 3n; s1 = 3, s2 = 6, s3 = 9, s4 = 12
C. r = 3; s1 = 3, s2 = 9, s3 = 27, s4 = 81
D. r = 3n; s1 = 3, s2 = 9, s3 = 27, s4 = 81


Answer: C

Mathematics

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