(5z + 8)ª Find the derivative of In 16 + 10

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 40E
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## Derivative of a Logarithmic Function

In this problem, we are asked to find the derivative of the natural logarithm function:

\[ \ln \left( \frac{(5x+8)^3}{x^6+10} \right) \]

### Steps to Solve

1. **Simplify the Logarithmic Expression:**

   Using the properties of logarithms, we can simplify the given expression:

   \[ \ln \left( \frac{(5x+8)^3}{x^6+10} \right) = \ln (5x+8)^3 - \ln (x^6+10) \]

   According to the power rule of logarithms \( \ln (a^b) = b \ln a \):

   \[ = 3 \ln (5x+8) - \ln (x^6+10) \]

2. **Differentiate the Simplified Expression:**

   Now, we can find the derivative of this simplified expression:

   \[ \frac{d}{dx} \left[ 3 \ln (5x+8) - \ln (x^6+10) \right] \]

   Applying the chain rule and the derivative of the natural logarithm function \( \frac{d}{dx} [\ln u] = \frac{1}{u} \cdot \frac{du}{dx} \):

   \[ = 3 \cdot \frac{1}{5x+8} \cdot \frac{d}{dx} [5x+8] - \frac{1}{x^6+10} \cdot \frac{d}{dx} [x^6+10] \]

3. **Evaluate the Derivatives of the Inside Functions:**

   \[ \frac{d}{dx} [5x+8] = 5 \]

   \[ \frac{d}{dx} [x^6+10] = 6x^5 \]

4. **Combine the Results:**

   Substituting these derivatives back into the expression:

   \[ = 3 \cdot \frac{5}{5x+8} - \frac{6x^5}{x^6+10} \]

   Simplify the terms:

   \[ = \frac{15}{5x+8} - \frac
Transcribed Image Text:## Derivative of a Logarithmic Function In this problem, we are asked to find the derivative of the natural logarithm function: \[ \ln \left( \frac{(5x+8)^3}{x^6+10} \right) \] ### Steps to Solve 1. **Simplify the Logarithmic Expression:** Using the properties of logarithms, we can simplify the given expression: \[ \ln \left( \frac{(5x+8)^3}{x^6+10} \right) = \ln (5x+8)^3 - \ln (x^6+10) \] According to the power rule of logarithms \( \ln (a^b) = b \ln a \): \[ = 3 \ln (5x+8) - \ln (x^6+10) \] 2. **Differentiate the Simplified Expression:** Now, we can find the derivative of this simplified expression: \[ \frac{d}{dx} \left[ 3 \ln (5x+8) - \ln (x^6+10) \right] \] Applying the chain rule and the derivative of the natural logarithm function \( \frac{d}{dx} [\ln u] = \frac{1}{u} \cdot \frac{du}{dx} \): \[ = 3 \cdot \frac{1}{5x+8} \cdot \frac{d}{dx} [5x+8] - \frac{1}{x^6+10} \cdot \frac{d}{dx} [x^6+10] \] 3. **Evaluate the Derivatives of the Inside Functions:** \[ \frac{d}{dx} [5x+8] = 5 \] \[ \frac{d}{dx} [x^6+10] = 6x^5 \] 4. **Combine the Results:** Substituting these derivatives back into the expression: \[ = 3 \cdot \frac{5}{5x+8} - \frac{6x^5}{x^6+10} \] Simplify the terms: \[ = \frac{15}{5x+8} - \frac
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