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If a = ( 1 − 2 3 − 4 2 5 ) and B = Ba = (Bij), Find B21 + B32. - Mathematics

Sum

If A = `((1, -2, 3),(-4,2,5)) and B = ((2,3),(4,5),(2,1))` and BA = (bij), find b21 + b32.

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Solution

b21 = - 16, b23 = - 2      ....[ For any one correct value ]
b21 + b23 = - 16 + (- 2) = - 18.

Concept: Operations on Matrices - Properties of Scalar Multiplication of a Matrix
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