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1.Given the function f(x)=1/x, using 3 rectangles of equal width, find an approximation to the area...

1.Given the function f(x)=1/x, using 3 rectangles of equal width, find an approximation to the area between the curve and the x-axis over the interval [4,8] if the heights of the rectangles are found by evaluating the function at the left endpoints, right endpoints, and midpoints of each subinterval created by a partition of the interval given.

2. Given the function, f(x)=−x3+6x2 using 6 rectangles of equal width, find an approximation to the area between the curve and the x-axis over the interval [2,6] if the heights of the rectangles are found by evaluating the function at the left endpoints, right endpoints, and midpoints of each subinterval created by a partition of the interval given

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