问题
填空题
计算|
|
答案
|
-1|+|1 2
-1 3
|+…+|1 2
+1 2007
|=(1-1 2006
)+(1 2
-1 2
)+…+(1 3
-1 2006
)=1+(-1 2007
+1 2
)+(-1 2
+1 3
…+( -1 3
+1 2006
)-1 2006 1 2007
=1-1 2007
=2006 2007
故答案为2006 2007
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