Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ UP PCS (Pre) 2007 Q.The integrating factor of the differential equation xdy-(y+xy2) dx = 0 is– A1/xy B2 2 1 x y C2 1 x D2 1 y Show answer Correct answer: 2 1 y