SOLUTION: write the first three terms of an arithmetic sequence if the fourth term is 10 and d=-3.

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Question 568967: write the first three terms of an arithmetic sequence if the fourth term is 10 and d=-3.
Answer by scott8148(6628) About Me  (Show Source):
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a + 3d = 10

a + 3(-3) = 10 ___ a - 9 = 10 ___ a = 19

19, 16, 13