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# 幫忙翻譯The area under the graph o

The area under the graph of a function

Let f be a nonnegative continuous function on [a,b]

The the area of the region under the graph of f is A= lim(n→∞) [f(x1)+f(x2)+…+f(xn)] △x

Where x1,x2,…,xn are arbitrary points in the n subintervals of [a,b] of equal width △x=(b-a)/n

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