Observation:-2004,20052,-20063,20074... then number n is ______.

Observation:-2004,20052,-20063,20074... then number n is ______.

∵-2004=(-1)1(1+2003)1,20052=(-1)2(2+2003)2,
-20063=(-1)3(3+2003)3,20074=(-1)4(4+2003)4…
The number n of is:(-1) n (n+2003) n,
Therefore, the answer is:(-1) n (n+2003) n.

-2004, The 2nd power in 2005, the 3rd power in 2006, the 4th power in 2007 is the rule, what is the number n (the number n is a positive integer) -2004, The second power power in 2005, the 3rd power in 2006, the 4th power in 2007 is the rule, and what is the number n (the number n is a positive integer)

An =(-2003-n)^n
(-2003-N)^n means the nth power of (-2003-n)