Problem 1CC

a Write an expression for a Riemann sum of a function f on an interval [a,b]. Explain the meaning of the notation that you use. b If f(x)0, what is the geometric interpretation of a Riemann sum? Illustrate with a diagram. c If f(x) takes on both positive and negative values, what is the geometric interpretation of a Riemann sum? Illustrate with a diagram.

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