a+1/a=-2
a+2+1/a=0
a²+2a+1=0
(a+1)²=0
a+1=0
a=-1
所以a^2008+(1/a^2008)
=1+1/1
=2
(1/a^2007)+(1/a^2008)-(1/a^2009)
=1/(-1)+1/1-1/(-1)
=1
a+1/a=-2
a+2+1/a=0
a²+2a+1=0
(a+1)²=0
a+1=0
a=-1
所以a^2008+(1/a^2008)
=1+1/1
=2
(1/a^2007)+(1/a^2008)-(1/a^2009)
=1/(-1)+1/1-1/(-1)
=1