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kicyunya [14]
3 years ago
14

Differentiating a Logarithmic Function In Exercise, find the derivative of the function

Mathematics
1 answer:
faust18 [17]3 years ago
4 0

Answer:  \dfrac{x^2}{(x^3+1)}

Step-by-step explanation

Properties of derivative , we use here :

  • \dfrac{d}{dx}(\ln x)=\dfrac{1}{x}
  • \dfrac{d}{dx}(x^n)=n(x)^{n-1}
  • \dfrac{d}{dx}(a)=0 , where a is constant.

The given function : y=\ln(x^3+1)^{\frac{1}{3}}

y=\dfrac{1}{3}\cdot \ln (x^3+1)  [\because n\ln x=\ln x^n]

Now , Differentiate both sides , we get

\dfrac{dy}{dx}=\dfrac{1}{3}\cdot \dfrac{1}{(x^3+1)}\cdot \dfrac{d}{dx}(x^3+1)

(By chain rule)

=\dfrac{1}{3}\cdot \dfrac{1}{(x^3+1)}\cdot (3x^2+0)

=\dfrac{1}{3}\cdot \dfrac{1}{(x^3+1)}(3x^2)

=\dfrac{x^2}{(x^3+1)}

Hence, the derivative of the function will be : \dfrac{x^2}{(x^3+1)}

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