ab互为相反数,a+2a+……+2008a+2008b+2007b

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ab互为相反数,a+2a+……+2008a+2008b+2007bab互为相反数,a+2a+……+2008a+2008b+2007bab互为相反数,a+2a+……+2008a+2008b+2007ba

ab互为相反数,a+2a+……+2008a+2008b+2007b
ab互为相反数,a+2a+……+2008a+2008b+2007b

ab互为相反数,a+2a+……+2008a+2008b+2007b
ab互为相反数
a+b=0
b=-a
a+2a+……+2008a+2008b+2007b+..+2b+b
=a+b+2(a+b)+..+2008(a+b)
=0

要答案吗?
我想结果是: (2007-1)×a或(2007-1)×b