Math Problem Statement

\frac{d}{dx}\left(\ln \left(x+4\right)\right)

Solution

To find the derivative of ln(x+4)\ln(x+4) with respect to xx, we can use the chain rule. The chain rule states that if we have a composite function f(g(x))f(g(x)), then the derivative ddxf(g(x))=f(g(x))g(x)\frac{d}{dx} f(g(x)) = f'(g(x)) \cdot g'(x).

Here, f(u)=ln(u)f(u) = \ln(u) and u=x+4u = x+4. Let's apply the chain rule:

  1. Find the derivative of the outer function f(u)=ln(u)f(u) = \ln(u) with respect to uu: dduln(u)=1u\frac{d}{du} \ln(u) = \frac{1}{u}

  2. Find the derivative of the inner function u=x+4u = x+4 with respect to xx: ddx(x+4)=1\frac{d}{dx} (x+4) = 1

  3. Apply the chain rule: ddx(ln(x+4))=dduln(u)ddx(x+4)\frac{d}{dx} \left(\ln(x+4)\right) = \frac{d}{du} \ln(u) \cdot \frac{d}{dx} (x+4) Substituting u=x+4u = x+4, we get: ddx(ln(x+4))=1x+41=1x+4\frac{d}{dx} \left(\ln(x+4)\right) = \frac{1}{x+4} \cdot 1 = \frac{1}{x+4}

Therefore, the derivative is: ddx(ln(x+4))=1x+4\frac{d}{dx}\left(\ln(x+4)\right) = \frac{1}{x+4}

Would you like more details or have any questions? Here are five questions you might consider next:

  1. How do you differentiate a function with a more complex inner function?
  2. What is the chain rule and how is it applied in different scenarios?
  3. How do you find the second derivative of ln(x+4)\ln(x+4)?
  4. Can you explain the derivative of the natural logarithm function ln(x)\ln(x)?
  5. How would you integrate 1x+4\frac{1}{x+4}?

Tip: Remember that the chain rule is a powerful tool for differentiating composite functions, allowing you to break down complex derivatives into simpler parts.

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Math Problem Analysis

Mathematical Concepts

Differentiation
Chain Rule
Natural Logarithm

Formulas

Chain rule for differentiation
Derivative of natural logarithm

Theorems

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Suitable Grade Level

Grades 11-12