复变画数 1901 Complex Analysis and Integral Transform (3)设二+2=ncos2+sin √3 2 5丌 5丌 z-2=r cos=+isin 6 3々+=h2l 则 √(3 2|+--r;i 72+2|+r2张 长 华 复变函数与积分变换 Complex Analysis and Integral Transform 1 1 1 1 3 (3) 2 cos sin 3 3 2 2 z r i r ri     + = + = +     设 2 2 2 5 5 3 1 2 cos sin 6 6 2 2 z r i r r i     − = + = − +     1 1 2 2 1 3 3 1 2 2 2 2 2 2 z r ri r r i     = − + = + +           则