Question: Consider the region below (x) = x/2, above the x-axis, and between x = 0 and x = 4. Let x i be the midpoint

Consider the region below ƒ(x) = x/2, above the x-axis, and between x = 0 and x = 4. Let xi be the midpoint of the ith subinterval.

(a) Approximate the area of the region using four rectangles.
(b) Find ∫04 ƒ(x) dx by using the formula for the area of a triangle.

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