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If A and B are square matrices of the...

If `A` and `B` are square matrices of the same order such that `|A|=3` and `A B=I` , then write the value of `|B|` .

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Given that` |A| = 3` and `AB = I`
Since `AB = I `
Taking determinant both sides
we get `3|B| = 1`
Hence, `|B| = 1/3`
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