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" EXAMPLE 3"quad " Show that "{i^(23)+((...

" EXAMPLE 3"quad " Show that "{i^(23)+((1)/(i))^(29)}^(2)=-4

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(i) if A=[{:(1,-1),(2,3):}], then show that A^(2)-4A+5I=O. (ii) if f(x)=x^(2)+3x-5and A=[{:(2,-1),(4,3):}], then find f(A).

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