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BEX Calculus Course. Lesson 4. 1. x. dx. 1. dx. r. r. p. dp. dx. x. Lesson 5: Building Squares. 1. 3. 5. 7. =. 1. + 3. + 5. + 7. + 9. 5x5. =. 5. + 7. + 9. 5x5. -. 2x2. The integral (accumulating a set of changes).
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BEX Calculus Course Lesson 4
1 x dx
1 dx r r p dp dx x
1 3 5 7
= 1 + 3 + 5 + 7 + 9 5x5
= 5 + 7 + 9 5x5 - 2x2 The integral (accumulating a set of changes) Can be found with the anti-derivative[a function where F’(x) = f(x)]
Applying a sequence of changes (f(x))from a to b Getting a function that changes the same way (F(x))and taking the difference Is the same as
x 20 Area = 20x x Area = ½ * 40 * x = 20x 40
1d Perimeter Change 2d Area Change 1 x x