Section 4.9: Antiderivatives

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Presentation transcript:

Section 4.9: Antiderivatives Practice HW from Stewart Textbook (not to hand in) p. 332 # 1-27 odd, 39, 40, 41

Antidifferentiation or Integration Suppose we are given a derivative of a function and asked to find . There are many answers for such as:

In general, we say that where C is known as the constant of integration.

Antidifferentiation or integration is the opposite of Notation: We use the indefinite integral to denote the antiderivative. Thus,

Basic Antiderivative (Integration Formulas) p. 329 1. 2.

3. 4. 5.

6. 7. 8.

9.

Example 1: Find the antiderivative of the function . Solution:

Example 2: Find the antiderivative of the function . Solution:

Example 3: Find the antiderivative of the function . Solution:

Example 4: Find the antiderivative of the function . Solution:

Properties of Integration 1. , where k is a constant – in our case a real number) 2.

Example 5: Find the antiderivative of the function . Solution:

Example 6: Find the antiderivative of the function . Solution:

Example 7: Find the antiderivative of the function Solution:

Differential Equations Differential equations are equations involving one or more of its derivatives. A simple example of a differential equation is given by

To find f (x), we integrate both sides with respect to x. which gives ← known as the general solution. The general solution expresses the solution in terms of the arbitrary constant C. If we are given an initial condition (a value for the function at a particular value of x), we can find the particular solution (where we find a particular value for the integration constant C).

Example 8: Solve the differential equation when . Solution:

Example 9: Find f given where Solution:

Vertical Motion Recall that given a position function . Velocity: Acceleration:

Hence, since integration is the opposite of differentiation, we can say: Velocity: Acceleration:

Example 10: A ball is thrown vertically upward from the ground at an initial height of 5 ft with an initial velocity of 64 ft/s. a. Find the position function b. How high will the ball go? c. How long thus it take for the ball to hit the ground. Solution: (In typewritten notes)