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Oscillatory Integrand


Hello !


   Does anybody know why numerically find the following integral:

NIntegrate[Cos[a0+a1*x+a2*x^2]*(b1/x+b2/x^2+...+b6/x^6),{x,250,Infinity}]  .

Where ai, bi - real numbers. Option "Method->Oscillatory" do not work.

                                          Nodar Shubitidze
                                          Joint Institute for Nuclear Research
                                          shubi at nusun.jinr.ru


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