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(a) Estimate the area under the graph of f(x) = 4 + 4x2 from x = -1 to x = 2 using three rectangles and right endpoints. R3 =Sketch the curve and the approximating rectangles for Rs. y 20 y 20E 15 - 15 10= 10 - -1 - 0.5 05 1.5 0-1 - 5 0.5 1.5 2 y E ySketch the curve and the approximating rectangles for L3. у 20 20 15 15 10- 10- 5- у 20 20- 15 15 10- 10- 5- X 1(c) Repeat part (a) using midpoints. M3 - 23 M6 - 23.75 Sketch the curve and the approximating rectangles for M3. у 20 20 15Sketch the curve and the approximating rectangles for M6 у 20 y 20- 15- 15- 10 10 5 X 0-1 -0.5 0.5 1 1.5 2 -0.5 0.5 1 1.5 2 y

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the kg and indoor anyximatic@gepreprogetto R6 Egrlich Ro 20 20 15 15 v 10 10 5 5 -1 -0.5 0.5 1 1.5 2 O-1 -0.5 0.5 1 1.5 2 20

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