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Questions  

Consider the system of equations ax+by+cz=2, bx+cy+az=2, cx+ay+bz=2,  where a,b,c are real numbers such that a+b+c=0. Then the system

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a
has two solutions
b
is inconsistent
c
has unique solution
d
has infinitely many solutions

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detailed solution

Correct option is B

abc2bca2cab2R3→R3+R1+R2               ~abc2abc2a+b+ca+b+ca+b+c6                                              ~abc2bca20006    ∵a+b+c=0RankΑ≠ RankAD ∴The system of equations is inconsistent


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If the system of equations ax + y= 3, x + 2y = 33x + 4y = 7 is consistent, then value of a is given by 


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