Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ PGT 2005 Q.The differential equation arising from φ(z/x3, y/x) = 0 is Apx + qy = 2z Bpx + qy = 3z Cpx – qy = 2z Dpx – qy = 3z Show answer Correct answer: px + qy = 3z