An arithmetic sequence is given. Find the common difference and write out the first four terms.{sn} = {n - 7}
A. d = -1; s1 = 6, s2 = 5, s3 = 4, s4 = 3
B. d = 1; s1 = -6, s2 = -5, s3 = -4, s4 = -3
C. d = -1; s1 = -6, s2 = -5, s3 = -4, s4 = -3
D. d = 1; s1 = 6, s2 = 5, s3 = 4, s4 = 3
Answer: B
Mathematics
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