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4.6 Numerical Integration. The Trapezoidal Rule One method to approximate a definite integral is to use n trapezoids.

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Presentation on theme: "4.6 Numerical Integration. The Trapezoidal Rule One method to approximate a definite integral is to use n trapezoids."— Presentation transcript:

1 4.6 Numerical Integration

2 The Trapezoidal Rule

3 One method to approximate a definite integral is to use n trapezoids.

4 The Trapezoidal Rule

5

6 Example:

7 Simpson’s Rule One way to view the trapezoidal rule if to say that on each subinterval, you approximate f by a 1 st degree polynomial. In Simpson’s Rule, you approximate f by a 2 nd degree polynomial.

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9 Simpson’s Rule For Simpson’s Rule, we are still going to partition [a,b] into n subintervals, but n must be even! We will look at 2 subintervals at a time and create a 2 nd degree polynomial, p, that passes through (x o, y o ), (x 1, y 1 ), and (x 2, y 2 ). Then,

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11 Example:


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