Determinant of An The notation An denotes .(a) If |An| = 0 for some integer n, then A must...

Determinant of An The notation An denotes .

(a) If |An| = 0 for some integer n, then A must be non-invertible. Show why this result is true.

(b) If |An| ≠ 0 for some integer n, then A must be invertible. Verify this result for n = 4.