The 15th term of an arithmetic series is 143 and the 31st term is 183. a) Find the first term and the common difference. b) Find the 100th term of the series.

Question

asked May 22, 2023 62.1k views

1 Answer

RobR · Answer 1 · 2023-05-27T11:00:49+0000

Answer:

-1557

Explanation:

a+14d=143

a+12d=183

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2d= -40

d= -20

a=183+240=423

a(100th)= 423+99*-20=423-1980= -1557

I hope that help =)