Asked by bob
Which of the following operations is not valid for matrices?
Adding two matrices of the same dimensions
Multiplying two matrices where the number of columns in the first matrix equals the number of rows in the second matrix
Adding two matrices of different dimensions
Finding the determinant of a square matrix
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GPT-5 mini
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Adding two matrices of different dimensions.
Matrix addition is only defined when the matrices have the same dimensions (same number of rows and columns). The other operations listed are valid as stated: multiplication is valid when the first's columns equal the second's rows, and determinants are defined for square matrices.
Matrix addition is only defined when the matrices have the same dimensions (same number of rows and columns). The other operations listed are valid as stated: multiplication is valid when the first's columns equal the second's rows, and determinants are defined for square matrices.
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