Q8 of 75 Page 8

Mark the correct alternative in the following:

For the system of equations:


x + 2y + 3z = 1


2x + y + 3z = 2


5x + 5y + 9z = 4


For the system of equations:


x + 2y + 3z = 1


2x + y + 3z = 2


5x + 5y + 9z = 4


The matrix equation corresponding to the above system is



Let A =


|A| = = 1(9-8) -2(18-15) +3(10-5) = 1-6+15 = 10


i.e., |A| 0


Hence, a unique solution exists of the above system.

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