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Old 2009-08-25, 14:11   #4
wblipp's Avatar
May 2003
New Haven

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Sometimes a change of variable in the integral helps. The integral convergence may be the same problem as the summation convergence - the integrand decreases so slowly that you need to keep extending the range of integration. The idea is to get a new integration variable that rapidly covers ranges of the old integration variable. Perhaps z = log x.

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