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Given a sequence 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5,......... ie the integer k occurs k times as consecutive terms .

(a) Find the 1989th term

(b) Find the sum of the first 1989 term .

2. Relevant equations

3. The attempt at a solution

some hints ?

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# Homework Help: Given a sequence 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5

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