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The minimum rate of change of the function $f (x) = 3 x^{5} - 5 x^{3} + 5 x - 7$ is

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Correct option is B

Rate of change of f(x) is f'(x)=15x4-15x2+5=15x4-x2+13=15x2-122+112≥1512=54The minimum vale of f is attained at x=+12 and equals 54.

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The minimum rate of change of the function f(x)=3x5-5x3+5x-7 is

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The minimum rate of change of the function $f (x) = 3 x^{5} - 5 x^{3} + 5 x - 7$ is