1.

N, the set of natural numbers, is partitioned into subsets S1​ ={1},S2​ ={2,3},S3​ ={4,5,6},S4​ ={7,8,9,10}. The last term of these groups is 1,1+2,1+2+3,1+2+3+4, so on. Find the sum of the elements in the subset S50​ .

Answer»

a. `S_12`
B. `S_13`
C. `S_12 and S_13`
d. `S_9, S_12 ,S_(13)`

ANSWER :D


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