$\"\"$

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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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$\"\"$ , then find $\"\"$ .

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$\"\"$

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Find $\"\"$ .

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Cofactor of $\"\"$

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$\"\"$

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$\"\"$

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Cofactor of $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Because $\"\"$ , therefore $\"\"$ is exist.so, $\"\"$ .

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$\"\"$

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$\"\"$ .