Q. 74.0( 4 Votes )

# Mark the correct

Answer :

The given system of linear equations is :-

+ - = 1

- + = 1

- + + = 1

Let = p , = q , = r

The equation becomes,

+ - = 1

- + = 1

- + + = 1

The matrix equation corresponding to the above system of equation is

Let A =

|A| =

Taking common from , from and from we get,

|A| = = 0

A unique solution exists.

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