Which of the following statements is true? (A) sin z / z2

Last updated: 8/3/2022

Which of the following statements is true? (A) sin z / z2 has a removable singularity at z = 0. (B) The function 1/zsinz2 has a pole of order 3 at z = 0. (C) The function e2/z2 has a simple pole at z = 0. (D) The function 1/z e^1/z has a removable singularity at = -0. (E) For function f(z) = 1/z^3(1-z)^3, we have Reso f(z) = 0.