I've got this error on the second integral. I put the code on wxMaxima and returned sucessfull. On wxMaxima, raise a question "z is positive, negative or zero?", also on sage, but on sage I can't answer that. How can I correct this?
x,y,z = var("x y z")
function = x*e^(-y)
integral(function,y,0,ln(x)).integral(x,0,2*z)
You can add some assumption:
sage: assume(z > 0)
sage: integral(function,y,0,ln(x)).integral(x,0,2*z)
2*z^2 - 2*z
A few alternatives :
sage: with assuming(z>0): integral(function,y,0,ln(x)).integral(x,0,2*z)
2*z^2 - 2*z
sage: with assuming(z<0): integral(function,y,0,ln(x)).integral(x,0,2*z)
2*z^2 - 2*z
sage: integral(function,y,0,ln(x)).integral(x,0,2*z, algorithm="sympy")
2*z^2 - 2*z
sage: integral(function,y,0,ln(x)).integral(x,0,2*z, algorithm="giac")
2*z^2 - 2*z
sage: integral(function,y,0,ln(x)).integral(x,0,2*z, algorithm="fricas")
2*z^2 - 2*z
Asked: 2020-08-25 15:50:58 +0100
Seen: 337 times
Last updated: Aug 25 '20
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