Question: a) The 15th term of an arithmetic progression is 24. The sum of the first 15 terms is 570. Work out the first three terms.

a) The 15th term of an arithmetic progression is 24. The sum of the first 15 terms is 570. Work out the first three terms.

b)
The sum of the first N terms of this arithmetic progression is 0.
Work out the value of N.

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