SOLUTION: the third term of an arithmetic sequence is 34 and the 15th term is -14. Determine the first 2 terms
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Question 1070605: the third term of an arithmetic sequence is 34 and the 15th term is -14. Determine the first 2 terms
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
the third term of an arithmetic sequence is 34 and the 15th term is -14. Determine the first 2 terms
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a(1)+2d = 34
a(1)+14d = -14
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Subtract and solve for "d"::
12d = -48
d = -4
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Solve for a(1)
a(1) + 2(-8) = 34
a(1) = 50
a(2) = 50-4 = 46
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Cheers,
Stan H.
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