Pertanyaan

The trace tr ( A ) of a matrix A = ( a 11 a 21 a 12 a 22 ) is defined by tr ( A ) = a 11 + a 22 . Prove that: tr ( I ) = 2

The trace $tr (A)$ of a matrix $A = (a_{11} a_{21} a_{12} a_{22})$ is defined by $tr (A) = a_{11} + a_{22}$ . Prove that:

$tr (I) = 2$

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O. Rahmawati

Master Teacher

Mahasiswa/Alumni UIN Sunan Gunung Djati Bandung

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The trace tr ( A ) of a matrix A = ( a 11 a 21 a 12 a 22 ) is defined by tr ( A ) = a 11 + a 22 . Prove that: tr ( A ⋅ B ) = tr ( B ⋅ A )

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