Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ Bihar (TRE 1.0) -2023 Q.An integrating factor of x () -2x dy + 3x +1 y = xe dx is Axe3x B3xex Cxex DMore than one of the above ENone of the above Show answer Correct answer: xe3x