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Question

An n×n array v is defined as follows:

v[i,j]=ij for all i,j
1in,1jn

The sum of the elements of the array v is

A
n2(n+1)/2
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B
n1
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C
n23n+2
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D
0
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Solution

The correct option is D 0
Array is

⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢0121n101210321(1n)(2n)0⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥

Sum=0+1+2+...+(1)+(2)+...
=0

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