A*S
发帖数: 24 | 1 When integrate the following:
f[x_,y_]=1/(1+(y-x)^2/4)/(1+(y+x)^2/4)
Integrate[f[x,y],{y,-Infinity,Infinity}]
it gives 0, but if I do integrate[f[0,y],,{y,-Infinity,Infinity}], it gives pi
.
How come? It looks so weird to me. Any wrong with it? |
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