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YS Lim
YS Lim

CIE A Level chevron_right Math chevron_right Malaysia

I need help with (b) and (c). Tqvm

Date Posted: 3 years ago
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Row operation on Matrix can be represented on row operation on Identity matrix:
R(A) = E(A)
(Elementary matrices, combining them)

A) swapping the rows:
Swapping identity matrix row:
0 1
1 0

B) scale first row by -1; second row by 2:
Apply on identity:
-1 0
0 2

C) swap rows;
scale 1st row by -3; second row by 2:
Apply on Identity:
0 -3
2 0
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Jasper Eng
Jasper Eng's answer
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