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CHAPTER 5

Integration SECTION 5.1 5.1.1 Estimate the area under the curve y = x2 by dividing the interval [0, 2] into 4 subintervals of equal length and constructing rectangles over the intervals. 5.1.2 Estimate the area under the curve y = 1/x by dividing the interval [1, 2] into 4 subintervals of equal length and constructing rectangles over the intervals. 5.1.3 Estimate the area under the curve y = x3 + 2 by dividing the interval [1, 4] into 3 subintervals of equal length and constructing rectangles over the intervals. 5.1.4 Estimate the area under the curve y = 1/x2 by dividing the interval [1, 4] into 6 subintervals of equal length and constructing rectangles over the intervals. √ 5.1.5 Estimate the area under the curve y = x by dividing the interval [0, 4] into 4 subintervals of equal length and constructing rectangles over the intervals. 5.1.6 Estimate the area under the line y = 2x + 3 by dividing the interval [1, 9] into 4 subintervals of equal length and constructing rectangles over the intervals. 5.1.7 Estimate the area of the graph of a function f (x) = there are 4 rectangles.

2x and the interval [a, b] = [0, 1] where

5.1.8 Estimate the area of the graph of a function f (x) = x3 and the interval [a, b] = [0, 1] where there are 4 rectangles. 5.1.9 Estimate the area of the graph of a function f (x) = 4x3 and the interval [a, b] = [0, 1] where there are 4 rectangles. 5.1.10 Estimate the area of the graph of a function f (x) = where there are 4 rectangles.

2x + 4 and the interval [a, b] = [0, 1]

5.1.11 Use a simple formula from geometry to find the area function A(x) that gives the area between the function f (x) = 5 and the interval [a, x] = [0, x]. 5.1.12 Use a simple formula from geometry to find the area function A(x) that gives the area between the function f (x) = x + 1 and the interval [a, x] = [−1, x]. 5.1.13 Use a simple formula from geometry to find the area function A(x) that gives the area between the function f (x) = x + 4 and the interval [a, x] = [0, x].

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