how can i find the 250th term of this sequence: 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5......?
how can i find the 250th term of this sequence: 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5......?
Adabi Ayodeji , 8 Years ago
Grade 12th pass
Algebra> how can i find the 250 th term of this se...
1 Answers
Arun
Dear student
There is a trick,
Put n(n+1)/2 = 250
n² + n -500 = 0
n = 21.86
Hence 22.
250th term will be 22.
Regards
Arun (askIITians forum expert)
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