error in the result of the integral

gladson_11 shared this question 1 month ago
Answered

when generating a surface using the sqrt (4-x ^ 2) function and calculating its area the geogebra always says that the value is unknown. What am I missing?

Comments (7)

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Which command gives an unknown value? When I create the function f(x)=sqrt(4 - x^2) and use Integral(f, -3, 5), or other start and endnumbers, I get the results I want.

chris

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Please post your .ggb file

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is the file

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f(x) isn't defined above x=2. Try Integral(f, 0,2) instead of Integral(f, 0,3)

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did not work that way

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it works for me

perhaps you want the red Volumen in attached

Files: foro.ggb
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also change Derivative(f)²)) by Simplify(Derivative(f)²))) because GG does integral(-1/sqrt(4-x^2)) =-asin(1/2x) and you expect acos(1/2 x) or use numerical integral or abs(integral(...................)) for area

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