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[" 10.Let "f(x)=x^(3)-6x^(2)+15x+3." The...

[" 10.Let "f(x)=x^(3)-6x^(2)+15x+3." Then,"],[[" (a) "f(x)>0" for all "x in R," (b) "],[" (c) "f(x)" is invertible "]]

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