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Math 125 Spring 2016 Take Home Quiz 20 NAME: Show all of your work and organize all of your steps otherwise you will not receive full/partial credit. 1. Using rectangles whose heights are given by the value of the function on the left-hand endpoint of the rectangle’s base, estimate the area under the graph of f (x) = x2 between x = 0 and x = 1 by using four rectagles of equal width. 2. Express the following in sigma notation: − 15 + 2 5 − 3 5 + 4 5 − 5 5 + 6 5 − 7 5 + 85 .