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2X1-X2+X3+7X4=0 -1X1-2X2-3X3-11X4=0 -1X1+4X2+3X3+7X4=0 a. Find the reduced row - echelon form of the coefficient matrix b....

2X1-X2+X3+7X4=0

-1X1-2X2-3X3-11X4=0

-1X1+4X2+3X3+7X4=0

a. Find the reduced row - echelon form of the coefficient matrix

b. State the solutions for variables X1,X2,X3,X4 (including parameters s and t)

c. Find two solution vectors u and v such that the solution space is \
a set of all linear combinations of the form su + tv.

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