1.2.1 求下面各题的所有的根、单根,并说明几何意义:-|||-(a) ((2i))^dfrac (1{2)};-|||-(b) ((1-sqrt {3)i)}^dfrac (1{2)};-|||-(c) ((-1))^dfrac (1{3)};-|||-(d) ((-16))^dfrac (1{4)};-|||-(e) ^dfrac (1{6)};-|||-(f) ((-4sqrt {2)+4sqrt (2)i)}^dfrac (1{3)}.
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