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

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a
Has two solutions
b
Inconsistent
c
Has unique solution
d
has infinitely many solution

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detailed solution

Correct option is B

Augmented matrix AD=abc2bca2cab2                                               R3→R1+R2+R2                                          ~abc2bca2a+b+ca+b+ca+b+c6                                           ~abc2bca20006 ∵a+b+c=0Here rankA=2 and rankAD=3∴rankA≠rankAD The given system is inconsistent


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The number of 3×3  matrices A  whose entries are either 0or1  and for which the system Axyz=100  has exactly two distinct solutions, is


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