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ISRO | ISRO CS 2017 | Question 46
  • Last Updated : 13 Mar, 2018

In a compact one dimensional array representation for lower triangular matrix (all elements above diagonal are zero) of size n x n, non zero elements of each row are stored one after another, starting from first row, the index of (i, j)th element in this new representation is
(A) i+j
(B) j+i(i-1)/2
(C) i+j-1
(D) i+j(j-1)/2


Answer: (B)

Explanation:

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