Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ UPPSC Polytechnic Lecturer 2021(II) Q.The solution of the integral equation φ(x) = 1 + φ ∫ x 0 (t) dt is – Aφ (x) = sin x Bφ (x) = cos x Cφ (x) = log x Dφ (x) = ex Show answer Correct answer: φ (x) = ex