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CHAPTER 5 SECTION 5.4 EXPONENTIAL FUNCTIONS: DIFFERENTIATION AND INTEGRATION. Definition of the Natural Exponential Function. Recall: . This means…. and…. Exponential and log functions are interchangeable. Start with the base. Change of Base Theorem. Solve. Solve.
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CHAPTER 5SECTION 5.4EXPONENTIAL FUNCTIONS:DIFFERENTIATION AND INTEGRATION
Recall: This means… and… Exponential and log functions are interchangeable. Start with the base. Change of Base Theorem
Solve. We can’t take a log of -1.
5.4 Exponential Functions • Example 3: Find dy/dx:
5.4 Exponential Functions • Example 3 (concluded):
5.4 Exponential Functions • THEOREM 2 • or • The derivative of e to some power is the product of e • to that power and the derivative of the power.
5.4 Exponential Functions • Example 4: Differentiate each of the following with • respect to x:
5.4 Exponential Functions • Example 4 (concluded):
Theorem: 1. Find the slope of the line tangent to f (x) at x= 3.
Theorem: 1. Find the slope of the line tangent to f (x) at x= 3.
4. Find extrema and inflection points for Crit #’s: Crit #’s: Can’t ever work. none
Intervals: Test values: f ’’(test pt) f(x) f ’(test pt) f(x) rel max rel min Inf pt Inf pt
5.4 Exponential Functions • Example 7: Graph with x≥ 0. Analyze the graph using calculus. • First, we find some values, plot the points, and sketch • the graph.
Example 4 (continued): • a) Derivatives. Since • b) Critical values. Since the derivative for all real numbers x. Thus, the • derivative exists for all real numbers, and the equation • h(x) = 0 has no solution. There are no critical values.
Example 4 (continued): • c) Increasing. Since the derivative for all real numbers x, we know that h is increasing over the entire real number line. • d) Inflection Points.Since we know that the equation h(x) = 0 has no solution. Thus there are no points of inflection.
5.4 Exponential Functions • Example 4 (concluded): • e) Concavity. Since for all real numbers x, h’ is decreasing and the graph is concave down over the entire real number line.