Comment #5 on issue 3211 by 521...@gmail.com: when using integrate, 'tuple'
object has no attribute 'has'
http://code.google.com/p/sympy/issues/detail?id=3211
But when I excute the first integral, it just output the integral as the
math expression like below:
In [1]: u0,I,n,a,R1,R2,r,L,b = symbols('u0,I,n,a,R1,R2,r,L,b')
In [2]: integrate(a*y**2/(y**2+(r-x)**2)**Rational(2,3),(x,-b/2,b/2))
...:
Out[2]:
b
─
2
⌠
⎮ 2
⎮ a⋅y
⎮ ────────────────── dx
⎮ 2/3
⎮ ⎛ 2 2⎞
⎮ ⎝y + (r - x) ⎠
⌡
-b
──
2
I don't know how?
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