Asked by chalton

the sixth term of an arithmetic progression is 21 and the sum of the first 17 terms is 0. write the first three terms.
Answered by Steve
a+5d=21
17/2 (2a+16d) = 0

The sequence is

56, 49, 42, 35, 28, 21, 14, 7, 0, ...
Answered by Anonymous
Answer
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