a11 a12 is the matrix: a22, (4) The adjugate of a 2 x 2 matrix A a21 a12 a22 adj(A) a11 -a21 A adj (A) det(A)I2. (a) Show that adj(A) A det(A) (b) Show that det(adj(A)) (c) Show that if A is invertible, then A-1= [det(A)]ladj(A)

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Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.