Va dx using upper and lower sums. Guess a (rational) number for the value of the Exercise 2: Estimate integral (using no other information). Remark: Your estimate should be correct to a couple decimal points, but don't spend forever on the problem. A calculator would probably be handy, since, e.g., computing V1/5 by hand is a bit of work. But your work should only be using the silly rectangles, and nothing else.

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