急求387,-18,-25/8,4202的立方根!

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急求387,-18,-25/8,4202的立方根!急求387,-18,-25/8,4202的立方根!急求387,-18,-25/8,4202的立方根!除-25/8能化简为-(三次根号25)/2外,都不

急求387,-18,-25/8,4202的立方根!
急求387,-18,-25/8,4202的立方根!

急求387,-18,-25/8,4202的立方根!
除-25/8能化简为 -(三次根号25)/2 外,都不能化简
三次根号387=7.28736
三次根号-18=-2.62074
三次根号-25/8=-(三次根号25)/2=-1.46201
三次根号4202=16.13685