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Pls put some efforts to do it, I definitely upvoted for correct answer! (1 point) Which of the matrices 1 0 0 0 EA 0

Pls put some efforts to do it, I definitely upvoted for correct answer!

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(1 point) Which of the matrices 1 0 0 0 EA 0 E= 0 0 E. = 0 0 E) = 0 -2 -9 0 0 0 -6 are elementary matrices? JA. E1 OB. E2 C. E3 OD. E4(1 point) If A and B are 8 X 7 matrices, and C is a 6 x 8 matrix, which of the following are defined? JA. C+ A OB. ACT OC. B + A OD. AC DE. AT OF CB

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