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[" 1.If "f(x)=kx^(3)-9x^(2)+9x+3" is mon...

[" 1.If "f(x)=kx^(3)-9x^(2)+9x+3" is monotonically increasing in "R,],[" then "],[[ak<3," h "k<=2],[ck>=3," d None of these "]]

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