1+2+1=4 1+2+3+2+1=9 1+2+3+4+3+2+1=16 1+2+3+4+5+4+3+2+1=25 根据上面几道题的规律,计算下面的题.(1)1+2+3+.+9+.+3+2+1=———(2)1+2+3+.+100+.+3+2+1=______(3)1+2+3+.+n+.+3+2+1=______
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/26 16:00:41
![1+2+1=4 1+2+3+2+1=9 1+2+3+4+3+2+1=16 1+2+3+4+5+4+3+2+1=25 根据上面几道题的规律,计算下面的题.(1)1+2+3+.+9+.+3+2+1=———(2)1+2+3+.+100+.+3+2+1=______(3)1+2+3+.+n+.+3+2+1=______](/uploads/image/z/632063-47-3.jpg?t=1%2B2%2B1%3D4+1%2B2%2B3%2B2%2B1%3D9+1%2B2%2B3%2B4%2B3%2B2%2B1%3D16+1%2B2%2B3%2B4%2B5%2B4%2B3%2B2%2B1%3D25+%E6%A0%B9%E6%8D%AE%E4%B8%8A%E9%9D%A2%E5%87%A0%E9%81%93%E9%A2%98%E7%9A%84%E8%A7%84%E5%BE%8B%2C%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E7%9A%84%E9%A2%98.%EF%BC%881%EF%BC%891%2B2%2B3%2B.%2B9%2B.%2B3%2B2%2B1%3D%E2%80%94%E2%80%94%E2%80%94%EF%BC%882%EF%BC%891%2B2%2B3%2B.%2B100%2B.%2B3%2B2%2B1%3D______%283%291%2B2%2B3%2B.%2Bn%2B.%2B3%2B2%2B1%3D______)
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