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Jim Wang Mr. Brose Period 6

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1 Jim Wang Mr. Brose Period 6
Riemann Sums Jim Wang Mr. Brose Period 6

2 Approximate the Area under y = x² on [ 0,4 ]
4 rectangles whose height is given using the left endpoint 4 rectangles whose height is given using the right endpoint 4 rectangles whose height is given using the midpoint 4 trapezoids Evaluate the integral directly

3 a) 4 rectangles whose height is given using the left endpoint
Left: ( b • h ) (1)0 + (1)1 + (1)4 + (1)9 Ans. = 14

4 b) 4 rectangles whose height is given using the right endpoint
Right: ( b • h ) (1)1 + (1)4 + (1)9 + (1)16 Ans. = 30

5 c) 4 rectangles whose height is given using the midpoint
Midpoint: ( b • h) (1)1/4 + (1)9/4 + (1)25/4 + (1)49/4 Ans. = 84/4 or 21

6 d) 4 trapezoids Area of Trapezoid: ½ h ( b1 + b2 ) 1 2 3 4 ½ [ 44 ]
½ (1) [ ] ½ [ 44 ] Ans. = 22

7 e) Evaluate the integral directly
Insert in Calculator: f(x) = 04 x² dx Ans. = 64/3


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