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Q21E
Expert-verifiedIf all the entries of a square matrix are 1 or 0, then must be 1, 0, or -1.
Therefore, the given condition is true.
A square matrix with real numbers or elements is said to be an orthogonal matrix, if its transpose is equal to its inverse matrix.
Or we can say, when the product of a square matrix and its transpose gives an identity matrix, then the square matrix is known as an orthogonal matrix.
For, matrices whose entries are 0 and 1 , the determinant can only be -1, 0 , or 1.
For matrices, where , this applies using the Laplace expansion.
Therefore,
.
Therefore, the given condition satisfied and the given statement is true.
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