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Mathematics 17 Online
OpenStudy (anonymous):

The first term of an arithmetic sequence is -3 and the fifteenth term is 53. What is the common difference of the sequence? 14/13 25/7 4

OpenStudy (tkhunny):

1: -3 2: -3 + d 3: -3 + 2d 4: -3 + 3d ... 15: -3 + 14d = 53 Where does that leave us?

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