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please solve this interesting problem

select first (2n+1) positive numbers starting from 1 i.e. 1,2,3,....(2n+1).find the numbers of the arithmetic progressions that can be formed using only those ( 2n+1) numbers...you all know to form an a.p you must need at least 3 numbers

Note by Sayan Chowdhury
4 years, 8 months ago

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