问题
解答题
2005
|
答案
原式=(2005+
)-(2004+1 2
)+(2003+1 3
)-(2002+1 2
)+…+(1+1 3
)-1 2 1 3
=[+++…+(3-2)+1]+(
-1 2
)×1 3 2006 2
=1×
+2006 2
×10031 6
=
.7021 6
2005
|
原式=(2005+
)-(2004+1 2
)+(2003+1 3
)-(2002+1 2
)+…+(1+1 3
)-1 2 1 3
=[+++…+(3-2)+1]+(
-1 2
)×1 3 2006 2
=1×
+2006 2
×10031 6
=
.7021 6