Apply the quotient rule, which is:
dxdg(x)f(x)=g2(x)−f(x)dxdg(x)+g(x)dxdf(x)
f(x)=x3+4 and g(x)=x2.
To find dxdf(x):
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Differentiate x3+4 term by term:
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The derivative of the constant 4 is zero.
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Apply the power rule: x3 goes to 3x2
The result is: 3x2
To find dxdg(x):
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Apply the power rule: x2 goes to 2x
Now plug in to the quotient rule:
x43x4−2x(x3+4)