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प्रश्न
Check whether the following matrix is invertible or not:
`[(1,0),(0,1)]`
उत्तर
Let A = `[(1,0),(0,1)]`
Then, |A| = `|(1,0),(0,1)|` = 1 – 0 = 1 ≠ 0
∴ A is a non-singular matrix.
Hence, A-1 exists.
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