Engineering, 22.09.2021 21:30, kms275

Sử dụng ten xơ e, chứng minh các biểu thức
a, eijkekij=6
b, eijkaj*ak=0

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Sử dụng ten xơ e, chứng minh các biểu thức
a, eijk*ekij=6
b, eijk*aj*ak=0...