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Question

Construct a 4×3 matrix A=[aij], whose element aij is aij=iji+j.

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Solution


aij=⎢ ⎢ ⎢a11a12a13a21a22a23a31a32a33a41a42a43⎥ ⎥ ⎥

Here, aij=iji+j

aiji=,j= iji+j
a11 i=1,j=1 111+1=02=0
a12 i=1,j=2 121+2=13
a13 i=1,j=3 131+3=24=12
a21 i=2,j=1 212+1=13
a22 i=2,j=2 222+2=0
a23 i=2,j=3 232+3=15
a31 i=3,j=1 313+1=24=12
a32 i=3,j=2 323+2=15
a33 i=3,j=3 333+3=0
a41 i=4,j=1 414+1=35
a42 i=4,j=2 424+2=26=13
a43 i=4,j=3 434+3=17
The required matrix is ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢013121301512150351317⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥

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