Apply the quotient rule, which is:
dxdg(x)f(x)=g2(x)−f(x)dxdg(x)+g(x)dxdf(x)
f(x)=log(x) and g(x)=3x.
To find dxdf(x):
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The derivative of log(x) is x1.
To find dxdg(x):
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The derivative of a constant times a function is the constant times the derivative of the function.
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Apply the power rule: x goes to 2x1
So, the result is: 2x3
Now plug in to the quotient rule:
3x−2x3log(x)+x3