Sequence

Between numbers 1 and 53 insert n members of the arithmetic sequence that its sum is 702.

Correct result:

n =  26

Solution:

Sn=n1+532=27 n=702  n=26S_n = n \dfrac{ 1 + 53 }{2} = 27 \ n = 702 \ \\ \ \\ n = 26

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