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 Integrals3h 25m
0. Functions
Exponential & Logarithmic Equations
Problem 3.9.6
Textbook Question
Explain why b^x = e^xlnb.
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1
Recall the definition of the natural exponential function, where e is the base of the natural logarithm and ln is the natural logarithm function.
Recognize that any exponential function can be expressed in terms of the natural exponential function using the change of base formula.
Use the property of logarithms that states ln(a^b) = b * ln(a) to rewrite b^x as e raised to the power of x times ln(b).
Express b^x as e^(ln(b^x)), which simplifies to e^(x * ln(b)) using the logarithmic identity mentioned.
Conclude that b^x = e^(x * ln(b)), which confirms that b^x can be expressed as e^x * ln(b).
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