设C:|z-2|=5为正向圆周,则int dfrac (2{z)^3+3(z)^2+2z+1}(z)dz=()A、2πіB、πі; C、i;D、0;

设C:|z-2|=5为正向圆周,则

A、2πіB、πі; C、i;D、0;

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