Math Chapter Wise Complex Integration, Cauchy's Theorem And Calculus Of Residue English MCQ DSSSB PGT 2021 Q.The residue of the function f(x) = 1 x e − at x = 0 Ais 1 BDoes not exist, since, 0 is not a singular point Cis 0 DDoes not exist, since 0 is not a non-isolated singular point Show answer Correct answer: Discrepancy / answer not specified in source