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https://jjthetutor.com/in-mmxnf-leet-ein-denote-the-matrix-whose-only-nonzeroe-entry-it-the-ith-ow-and-jth-colunm-prove-that-is-linearly-independent/
In. Mmxn(f). Leet Ein denote the matrix whose only nonzeroe entry it the ith ow and jth colunm. Prove that is linearly independent