Question: let A= [ -4 a ] 2 b (a) under what conditions on a and b rank (A) =2? (b) under what conditions on a

let

A= [ -4 a ]

2 b

(a) under what conditions on a and b rank (A) =2?

(b) under what conditions on a and b rank (A) =1?

(c is it possible to choose a and b so that rank (A) =0? briefly explain your answer.

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