(1-2i)-(2-3i)+(3-4i)-……-(2006-2007i)+(2007-2008i)-(2008-2009i)=?
问题描述:
(1-2i)-(2-3i)+(3-4i)-……-(2006-2007i)+(2007-2008i)-(2008-2009i)=?
答
(1-2i)-(2-3i)+(3-4i)-……-(2006-2007i)+(2007-2008i)-(2008-2009i)
=(1-2+3-4.-2008)+(-2+3-4+5.+2009)i
=-1004+1004i