A geometric sequence is given. Find the common ratio and write out the first four terms.{sn} = {5n}
A. r = 5; s1 = 5, s2 = 25, s3 = 125, s4 = 625
B. r = 5n; s1 = 5, s2 = 25, s3 = 125, s4 = 625
C. r = 5; s1 = 5, s2 = 10, s3 = 15, s4 = 20
D. r = 5n; s1 = 5, s2 = 10, s3 = 15, s4 = 20
Answer: A
Mathematics
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