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Question

If the system of equation xā€“2y+z=a,2x+yā€“2z=b and x+3yā€“3z=c have atleast one solution, then the relationship between a, b and c is


A

a + b + c = 0

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B

a – b + c = 0

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C

–a + b + c = 0

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D

a + b – c = 0

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Solution

The correct option is B

a – b + c = 0


D=∣ ∣121212a23∣ ∣ which vanishes; hence for atleast one solution D1=D1=D3=0
D1=∣ ∣a21b12c33∣ ∣=0ab+c=0


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