Interval to determine the height of the rectangle

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Suppose you estimate the area under the graph of f(x)=1/x from x=11 to x=111 by adding the areas of rectangles as follows:

Partition the interval into 50 equal subintervals and use the left endpoint of each interval to determine the height of the rectangle. 

What is the area of the 28th rectangle?

Reference no: EM132059785

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