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Question 93647: FOR PROBLEMS 18 - 20 USE THESE MATRICES:
A = [2 1 7
4 3 8
6 5 9]
B = 0
2
3
Find A2,1
If C = AxB, the order of C is:
If C=AxB, find C2,1.
Thank you in advance for your help - these are so tough for me
Answer by jayanthihemkos@yahoo.com(87)   (Show Source):
You can put this solution on YOUR website! FOR PROBLEMS 18 - 20 USE THESE MATRICES:
A = [2 1 7
4 3 8
6 5 9]
B = 0
2
3
Find A2,1
ANS: 4 ( i.e the element in the second row first column)
If C = AxB, the order of C is:
Order of A = 3x3 matrix
Order of B = 3x1 matrix
Oder of C = AxB = 3x1 (row of A x column of B )
(3x 1)
If C=AxB, find C2,1.
C= AXB = [ 2x0+1x2+7x3
4x0+3x2+8x3
6x0+5x2+9x3]
= [0+2+21
0+6+24
0+10+27]
C= AXB
= [23
30
37]
C2,1 = 30 ( element of second row first column)
jayanthihemkos@yahoo.com
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