The fixed point that is attractor for the function f(z) = z³ +z² + a) -1 b) c) 1 d) None of the above z² -9 The residue Res (31) for the function R(z) = is (z²+9)² a) i b) - 3i c) 2 d) 0 The solution to the equation e² + e² + 1 = 0 is a) z=(+2+2km). 3 k = 0,±1,+2,... 2π b) zit +2kл k = 0,±1,+2,... 3 2k k = 0,±1, +2,... 09) 2-(2+2). c) = 2π 1) z = (2 + 2km), d) z= 3 k = 0,±1.+2.... 1+i The principle value of (1+i) is a) (1+1) exp(+log 2) 4 2 π b) (1+i)exp i 42 -log 2 c) (1-1)exp(-log 2) 4 2 πί d) (1+i) exp(+10 -log 2 4 2 3 1 2- is