\"\"

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The matrix is  \"\".

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Definition of inverse matrix :

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If \"\" is an \"\" then \"\", where \"\".

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Let \"\", Then \"\".

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\"\"

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\"\"

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\"\".

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\"\".

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Therefore \"\" is does not exist and \"\" is a singular matrix.

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\"\"

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\"\" is does not exist and \"\" is a singular matrix.