1.观察下面的算式:6☆2=6+7=13 2☆3=2+3+4=9 5☆4=5+6+7+8=26 根据上面式子所表示的运算,求7☆5.(写过程)2.(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×……×(1+1/99)×(1-1/99)3.已知甲:乙=5:6,乙:丙
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:29:59
![1.观察下面的算式:6☆2=6+7=13 2☆3=2+3+4=9 5☆4=5+6+7+8=26 根据上面式子所表示的运算,求7☆5.(写过程)2.(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×……×(1+1/99)×(1-1/99)3.已知甲:乙=5:6,乙:丙](/uploads/image/z/10768087-55-7.jpg?t=1.%E8%A7%82%E5%AF%9F%E4%B8%8B%E9%9D%A2%E7%9A%84%E7%AE%97%E5%BC%8F%3A6%E2%98%862%3D6%2B7%3D13+2%E2%98%863%3D2%2B3%2B4%3D9+5%E2%98%864%3D5%2B6%2B7%2B8%3D26+%E6%A0%B9%E6%8D%AE%E4%B8%8A%E9%9D%A2%E5%BC%8F%E5%AD%90%E6%89%80%E8%A1%A8%E7%A4%BA%E7%9A%84%E8%BF%90%E7%AE%97%2C%E6%B1%827%E2%98%865.%EF%BC%88%E5%86%99%E8%BF%87%E7%A8%8B%EF%BC%892.%EF%BC%881%2B1%2F2%EF%BC%89%C3%97%EF%BC%881-1%2F2%EF%BC%89%C3%97%EF%BC%881%2B1%2F3%EF%BC%89%C3%97%EF%BC%881-1%2F3%EF%BC%89%C3%97%E2%80%A6%E2%80%A6%C3%97%EF%BC%881%2B1%2F99%EF%BC%89%C3%97%EF%BC%881-1%2F99%EF%BC%893.%E5%B7%B2%E7%9F%A5%E7%94%B2%EF%BC%9A%E4%B9%99%3D5%EF%BC%9A6%2C%E4%B9%99%EF%BC%9A%E4%B8%99)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:29:59