Problem 8. (1 point) Determine if the linear system 2x1 2x2 X2 - X3 = = 5x3 3x3 0 -12 -1 is in echelon form. First choos

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Problem 8 1 Point Determine If The Linear System 2x1 2x2 X2 X3 5x3 3x3 0 12 1 Is In Echelon Form First Choos 1 (69.47 KiB) Viewed 33 times

Problem 8. (1 point) Determine if the linear system 2x1 2x2 X2 - X3 = = 5x3 3x3 0 -12 -1 is in echelon form. First choose which of the following statements are correct. If there is more than one reason why the system is not in echelon form, type the letters as a comma separated list. If the system is in ech- elon form, make sure to type D as your answer. A. The system is not in echelon form because a variable is the leading variable of two or more equations. B. The system is not in echelon form because the system is not organized in a descending "stair step" pattern so that the index of the leading variables increases from the top to bottom. C. The system is not in echelon form because not every equation has a leading variable. D. The system is in echelon form. Correct Letter(s): If the system is in echelon form, also identify the leading vari- ables and the free variables in the corresponding answer blanks below. Type x1, x2, and x3 to enter the variables x₁, x2, and x3 and separate multiple variables by using a comma. If the system is in echelon form and no such variable exist, type none. If the systent is not in echelon form, type NA in both answer blanks. Leading variable(s): Problem 9. (1 point) Find the set of solutions for the linear system 3x3 x2 + 3x3 3x3 Use s1, s2, etc. for the free variables if necessary. XI (81, 82,83) = (- Answer(s) submitted: (incorrect) 4x2 11 # -8 11 3