Answer to Question #21506 in Algebra for lishan hailu
2013-01-25T02:29:34-05:00
A=(0 2 3) (7 6 3)
(2 1 4) and B= (1 4 5)then the value of c=2A+3B is.......
1
2013-01-29T11:45:13-0500
The matrix 2A is obtained from A by multiplying eachcoefficient of A by 2, so 2A = (2*0 2*2 2*3) (2*2 2*1 2*4) = (0 4 6) (4 2 8) Similarly, 3B =(3*1 3*4 3*5) (3*7 3*6 3*3) = (3 12 15) (21 18 9) The sum of matrices 2A+3B is the matrix whose coeficientsare sums of the corresponding coefficients of 2A and 3B: C = 2A + 3B =(0 4 6) (4 2 8) + (3 12 15) (21 18 9) = (0+3 4+12 6+15) (4+21 2+18 8+9) = (3 16 21) (25 20 17)
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