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Problem Bank

[Maximum mark: 5]

A system of equations is given by

⎩⎪⎪⎪⎨⎪⎪⎪⎧x+2y+z=4,2x+y+3z=9,x+0y+2z=5.

Write this system in the form Ax=b, and find A−1.
[3]
Hence solve for (x,y,z).
[2]

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