Table of contents
- 0. Functions7h 52m
- Introduction to Functions16m
- Piecewise Functions10m
- Properties of Functions9m
- Common Functions1h 8m
- Transformations5m
- Combining Functions27m
- Exponent rules32m
- Exponential Functions28m
- Logarithmic Functions24m
- Properties of Logarithms34m
- Exponential & Logarithmic Equations35m
- Introduction to Trigonometric Functions38m
- Graphs of Trigonometric Functions44m
- Trigonometric Identities47m
- Inverse Trigonometric Functions48m
- 1. Limits and Continuity2h 2m
- 2. Intro to Derivatives1h 33m
- 3. Techniques of Differentiation3h 18m
- 4. Applications of Derivatives2h 38m
- 5. Graphical Applications of Derivatives6h 2m
- 6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
- 7. Antiderivatives & Indefinite Integrals1h 26m
- 8. Definite Integrals4h 44m
- 9. Graphical Applications of Integrals2h 27m
- 10. Physics Applications of Integrals 3h 16m
- 11. Integrals of Inverse, Exponential, & Logarithmic Functions2h 34m
0. Functions
Properties of Logarithms
Problem 3.9.7
Textbook Question
Simplify the expression e^xln(x²+1).

1
First, recognize that the expression involves the natural logarithm function ln and the exponential function e. The expression is e raised to the power of x times ln(x² + 1).
Use the property of logarithms that states ln(a^b) = b * ln(a). In this case, you can rewrite ln(x² + 1) as ln((x² + 1)^1), which is simply ln(x² + 1).
Next, apply the property of exponents that states e^(a * ln(b)) = b^a. This allows you to simplify e^(x * ln(x² + 1)) to (x² + 1)^x.
Now, the expression is simplified to (x² + 1)^x. This is the simplified form of the original expression.
Finally, verify the simplification by considering the properties used: the logarithmic identity and the exponential identity. Ensure that each step logically follows from the previous one.

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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Exponential Functions
Exponential functions are mathematical expressions in the form of a constant raised to a variable exponent, commonly represented as e^x, where e is Euler's number (approximately 2.718). These functions exhibit unique properties, such as the derivative of e^x being e^x itself, which is crucial for simplification and differentiation in calculus.
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Natural Logarithm
The natural logarithm, denoted as ln(x), is the logarithm to the base e. It is the inverse function of the exponential function, meaning that if y = ln(x), then e^y = x. Understanding the properties of logarithms, such as ln(a*b) = ln(a) + ln(b), is essential for simplifying expressions involving logarithmic terms.
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Product Rule of Differentiation
The product rule is a fundamental principle in calculus used to differentiate products of two functions. It states that if u(x) and v(x) are two differentiable functions, then the derivative of their product is given by u'v + uv'. This rule is important when simplifying expressions that involve products of functions, such as e^x and ln(x²+1) in the given expression.
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