Calculus 2: Integration (7 of 9) Approximate the Area Under the Curve 2

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In this video I find the approximate area under f(x)=x^2+2 by adding the area of 4 rectangles using the midpoints as the height of of the rectangles.

Next video in the series can be seen at:
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Now, how to count the length of a curve from x=2 to x=-2? We have watch the area and volume count with integral, but not the length.

robyheriyanto
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Good evening Sir, am interested to study mathematical economics .how to find without knowing the function f(x) area under the curve, there are several methods but Sir which method is better to find, Reply me Sir.Thank u

sangeethasangeetha-pyeu
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how reducing the power and multyplication of the new power is derevative and the opposite process is integration !?

mostafaabdelrauof