Why does symbolic integration return the wrong answer for this integral?
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Gareth Fuller
le 23 Fév 2021
Commenté : Walter Roberson
le 23 Fév 2021
Hello! I'm trying to integrate 1/(1-x)^2 with the bounds 0 to x.
Now, other sources (Like WolframAlpha) return the result as -x/(x-1). However, MATLAB returns inf.
Can anyone explain why this would be?
syms x
expr = 1/(1-x)^2
int(expr, 0, x)
ans =
Inf
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Walter Roberson
le 23 Fév 2021
syms x a
expr = 1/(1-x)^2
F = int(expr, x, 0, a)
subs(F,a,x)
2 commentaires
Walter Roberson
le 23 Fév 2021
I am not sure. My expectation was that I would be able to control the output by adding in an assume() or tossing in an 'IgnoreAnalyticConstraints' option, but those did not work.
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