1. Let e %3| where a, b, c, d, e, f, g.h,i are some real numbers, if det (A)=5 answer the following questions: (a) Is A invertible? (Justify your answer). Find rank(A). (b) Let la+d b+e c+ B = and C = 2d -2e -2f %3D 2g 2h 2i 3g 3h 31 Compute det(B) and det(C). (c) Compute det(A) and det (adj(A)).

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