Mathematics, 05.11.2019 04:31 dreamdancekay

The fifth term of an arithmetic sequence is 20 and the twelfth term is 41.
(a) (i) find the common difference.
(ii) find the first term of the sequence.
(b) calculate the eighty-fourth term.
(c) calculate the sum of the first 200 terms.

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The fifth term of an arithmetic sequence is 20 and the twelfth term is 41.
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