248.Using matrices, solve the following system of equations: 3x – y + z = 5 2x – 2y + 3z = 7 x + y – z = 1
The given equations are 3x – y + z = 5 2x – 2y + 3z = 7 x + y – z = 1 These equations can be written as
Co-factors of the elements of first row of | A | are i.e. – 1, 5, 4 respectively Co-factors of the elements of second row of | A | are i.e. 0. – 4, – 4 respectively. Co-factors of the elements of third row of | A | are
Now,
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Long Answer Type
249.Using matrices, solve the following system of equations: 2x – y + z = 0 x + y – z = 6 3x – y – 4 z = 7
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250.
Using matrices, solve the following system of equations: x + 2y + z =1 2x – y + z = 5 3x + y – z = 0