Mathematics

Mathematics

Problem

Let gg be a continuous function on the interval [2,5][2,5]. It is known that ∫25g(x) dx=7.\int_{2}^{5} g(x)\,dx = 7. (a) Determine the exact value of ∫52g(x) dx\int_{5}^{2} g(x)\,dx. (b) Describe, in complete sentences, how the value in part (a) is consistent with the geometric interpretation of a definite integral as signed area. Your explanation should reference the orientation of the interval of integration and the effect of that orientation on the sign of the integral. (a) Determine ∫52g(x) dx\int_{5}^{2} g(x)\,dx. (b) Explain why the sign of your answer in part (a) is appropriate when the definite integral is interpreted as the signed area between the graph of gg and the xx–axis on the interval [2,5][2,5]. Be explicit about the role of the limits of integration.

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