Question

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請問這題怎麼解？

1 Use Theorem 4.2.1 to determine which of the followling are
Subspaces of 和

(a) The set of all diagonalza x matrlces.

(b) The set ofalla x matrices A such that det(4) 三 0.
(c) The set ofalla x matrices A such thattr(4) 三 (0.

(d) The set of all symmetrlca x 7 matrlces.

(e) The set ofallza x matrices A such that A{ 三 一4.

“igure A.2

     

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