Math, asked by uttaraudayan55, 4 days ago

In arithmetic sequence the su m of First t nine terms is 279 and the sum of the first twentyterms is 1280. Then (a) what is the 5th term of the sequence? by what is the 16th term of the sequence? (c) write the sequence? (d) find sum of first 'n' terms?

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Answered by Anonymous

1

Step-by-step explanation:

please see the attached for solution.

Rest can be easily found

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