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[" C "],[" If "f(x)=kx^(3)-9x^(2)+9x+3" ...

[" C "],[" If "f(x)=kx^(3)-9x^(2)+9x+3" is an increasing function for all "x" then "],[[" (a) "k<3," (b) "k<=3," (c) "k>3," (d) "k" is indeterminate "]]

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