-2004²,2005²,-2006²,2007²,...,第n个数为?
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-2004²,2005²,-2006²,2007²,...,第n个数为?
-2004²,2005²,-2006²,2007²,...,第n个数为?
-2004²,2005²,-2006²,2007²,...,第n个数为?
(-1)^n*(n+2003)^2