Question: he functionf(x)=ln(2x)3x is positive and continuous forx > because the logarithm function is continuous. But it is not obvious whether or not f is decreasing,

he functionf(x)=ln(2x)3x is positive and continuous forx > because the logarithm function is continuous. But it is not obvious whether or not f is decreasing, so we compute its derivative.f'(x)=3x 3 ln(2x)9x2

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