(1+3+5+7+•••••••+2003)﹣
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![(1+3+5+7+•••••••+2003)﹣](/uploads/image/z/11657372-68-2.jpg?t=%EF%BC%881%2B3%2B5%2B7%2B%26%238226%3B%26%238226%3B%26%238226%3B%26%238226%3B%26%238226%3B%26%238226%3B%26%238226%3B%2B2003%EF%BC%89%EF%B9%A3)
(1+3+5+7+•••••••+2003)﹣
(1+3+5+7+•••••••+2003)﹣
(1+3+5+7+•••••••+2003)﹣
汪孟同学你好:
(1+3+5+7+•••••••+2003)=(1+2003)*1002/2=1004004
希望我的回答对您有帮助,祝好!
及时采纳,谢谢.
=2004X1001=2006004
1002^2
1+3+5+7+......+2003
=(1+2003)/2*(1+2003)/2
=1002^2
=1004004