Asked by Ana

an arithmetic series is such that the ninth term is zero and the sum of first 25 terms is 50.the first term of the series?

Answers

Answered by Steve
just plug and chug:

a+8d = 0
25/2 (2a+24d) = 50

8d = -a, so

25/2 (2a-3a) = 50
a = -4
Answered by Ana
Thank you God bless you :)
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