Math Problem Statement

这里的充分性是如何一步步化简得出的?

Solution

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Math Problem Analysis

Mathematical Concepts

Matrix Algebra
Positive Definiteness
Inverse Matrix

Formulas

x^T(AB + B^TA)x > 0
x^T AB x + (Bx)^T A x = 2(Ax)^T B x

Theorems

Positive Definite Matrix Definition
Properties of Matrix Transposition
Inverse Matrix Theorem

Suitable Grade Level

Undergraduate level (Linear Algebra)