Question: Show that a 2 Ã 2 matrix (a) Nonsingular if and only if ad - bc 0. (b) Regular if and only if ad -

Show that a 2 × 2 matrix
Show that a 2 × 2 matrix (a) Nonsingular if and

(a) Nonsingular if and only if ad - bc ‰  0.
(b) Regular if and only if ad - bc ‰  0 and α ‰  0.

A-C )is 4

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