Right Endpoint Integration Example - # 3

Jason76

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Estimate area, 4 right endpoints and rectangles. Is this an overestimate or underestimate?

\(\displaystyle f(x) = 5\sqrt{x}\) on interval \(\displaystyle [0,4]\) given \(\displaystyle [a, b]\)

\(\displaystyle \sum\limits_{i=4}^n \Delta x [f(a + i \Delta x)]\)

\(\displaystyle \Delta x = \dfrac{b - a}{n}\)

\(\displaystyle \Delta x = \dfrac{\dfrac{4} - 0}{4} = 1\)

\(\displaystyle n = 4\)

\(\displaystyle \sum\limits_{i=4}^n (1) [[f(0 +(1)(1)] + [f(0 +(2)(1)] + [f(0 +(3)(1)] + [f(0 +(4)(1)]]\)

\(\displaystyle \sum\limits_{i=4}^n (1) [[f((1)(1)] + [f((2)(1)] + [f((3)(1)] + [f((4)(1)]]\)

\(\displaystyle \sum\limits_{i=4}^n (1) [[f((1)] + [f((2)] + [f((3)] + [f((4)]]\)

\(\displaystyle \sum\limits_{i=4}^n (1) [[5\sqrt{(1)}] + [5\sqrt{(2)}] + [5\sqrt{(3)}] + [5\sqrt{(4)}]]\)

\(\displaystyle \sum\limits_{i=4}^n (1) [[5(1)] + [5\sqrt{2}] + [5\sqrt{3}] + [5(2)]]\)

\(\displaystyle \sum\limits_{i=4}^n (1) [[5] + [5\sqrt{2}] + [5\sqrt{3}] + [10]]\)

\(\displaystyle \sum\limits_{i=4}^n [[5] + [5\sqrt{2}] + [5\sqrt{3}] + [10]]\) On the right track? :confused:
 
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