(a) Prove that the value of a determinant all of whose elements below the principal diagonal are...

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(a) Prove that the value of a determinant all of whose elements below the principal diagonal are zero is equal to the product of the diagonal elements. (Such a determinant is called upper triangular.)
(b) How many terms are there in the expansion of an nth-order determinant?
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Quantum Chemistry

ISBN: 978-0321803450

7th edition

Authors: Ira N. Levine

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