Skene, Norman L. (Norman Locke), 1878-1932 · New York : The Rudder Pub. Co. · leaf 17
tiply the sum by the common interval. Refer-ring to figure 1 the area by the trapezoidal rule is : Area=s (i^a+b+c+d+i^e)If the bounding curve started at A and ended at D, making the end or-dinates zero, the area would be : Area=s (b-|-c-{-d)This rule may be used with any number of ordinates. The… … Fir.. 2, The area between BC, CD, DE, and EF and the curve is entirely neglected.This error is unimportant if the ordinates are sufficiently nu-merous, or if the curve is very flat. Where there is a re-verse in the curvature the loss on the convex portionof the curve is offset partially or entirely…
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