Question: Let A be a nonsingular symmetric matrix. (a) Show that xTK~1x = yTK y, where Ky = x. (b) Prove that if K is positive

Let A" be a nonsingular symmetric matrix.
(a) Show that xTK~1x = yTK y, where Ky = x.
(b) Prove that if K is positive definite, so is K-1.

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