(-1的立方根)+ (-8的立方根)+(-27的立方根)+…(-2009的立方的立方根)=-1-2-3-...-2009=-(1+2009)/2=-1005
=-(1+2+3+……+2009)=-(1+2009)*2009/2=-2019045
-1+(-2)+(-3)+……+(-19)=-210