Let E be the 3 x 3 matrix that corresponds to the row operation R3 = R3 – 3R1 (a) Find E 1. E 1= 26 20 32 (b) Find EA where A = 30 45 4: 31 50 EA = Are the following helpful? v Example 2.21. v Proposition 3.19. v Example 3.66. v Example 3.67.

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