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limit(3**n*3**(-n - 1)*(n + 1)**2/n**2, n, oo) is wrong #10610
From https://stackoverflow.com/questions/35428617/sympy-fails-limit-test. If you expand the expression first the terms cancel and it gets the answer right. The answer should be 1/3.
added a commit
Feb 17, 2016
It seems that the test