(1 point)
Suppose f(x)=x211f(x)=x211. (a) The rectangles in the graph A illustrate f(x)f(x) on the interval 2?x?62?x?6. The area of all the rectangles is , and it is an ? overestimate of equal to underestimate of there is ambiguity the area of the region enclosed by y=f(x)y=f(x), the x-axis, and the vertical lines x=2x=2 and x=6x=6. (b) The rectangles in the graph B illustrate for f(x)f(x) on the interval 2?x?62?x?6. The area of all the rectangles is , and it is an ? overestimate of equal to underestimate of there is ambiguity the area of the region enclosed by y=f(x)y=f(x), the x-axis, and the vertical lines x=2x=2 and x=6x=6. |
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(c) To get a more accurate approximation of the area, the number of rectangles should: ? increase decrease exact number of rectangles.
Note: Your objective is to find an approximation of the area
under the curve on the interval 2?x?62?x?6 using the
areas of each of the sets of rectangles.