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Y=X³;-6X²;+9X-5y'=3x²;-12x+9=3(x²;-4x+3)=3(x-1)(x-3)清單:x(-∞,1)1(1,3)3(3,+∞)f'(x)+ 0 - 0 +f(x)增極大值减極小值增∴f(x)增區間(-∞,1),(3,+∞)减區間(1,3)f(x)極大值…
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