An arithmetic sequence is given. Find the common difference and write out the first four terms.{sn} = 
A. d = 
; s1 = 
, s2 = 
, s3 = 
, s4 = 
B. d = 
; s1 = 
, s2 = 
, s3 = 
, s4 = 
C. d = 
; s1 = 
, s2 = 
, s3 = 
, s4 = 
D. d = 
; s1 = 
, s2 = 
, s3= 
, s4 = 
Answer: C
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A. Yes
B.
| No |
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