作业帮化简[(2³-1)(3³-1)(4³-1)...(99³-1)(100³-1)]/[(2³+1)(3³+1)(4³+1)...(99³+1)(100³+1)]其值最接近于（）A.1/2 B.1/3 C.2/3 D.5/8另一题：分解因式：x^4 -x^3 +x^2+2
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![化简[(2³-1)(3³-1)(4³-1)...(99³-1)(100³-1)]/[(2³+1)(3³+1)(4³+1)...(99³+1)(100³+1)]其值最接近于（）A.1/2 B.1/3 C.2/3 D.5/8另一题：分解因式：x^4 -x^3 +x^2+2](/uploads/image/z/3008873-65-3.jpg?t=%E5%8C%96%E7%AE%80%5B%282%26%23179%3B-1%29%283%26%23179%3B-1%29%284%26%23179%3B-1%29...%2899%26%23179%3B-1%29%28100%26%23179%3B-1%29%5D%2F%5B%282%26%23179%3B%2B1%29%283%26%23179%3B%2B1%29%284%26%23179%3B%2B1%29...%2899%26%23179%3B%2B1%29%28100%26%23179%3B%2B1%29%5D%E5%85%B6%E5%80%BC%E6%9C%80%E6%8E%A5%E8%BF%91%E4%BA%8E%EF%BC%88%EF%BC%89A.1%2F2+B.1%2F3+C.2%2F3+D.5%2F8%E5%8F%A6%E4%B8%80%E9%A2%98%EF%BC%9A%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%EF%BC%9Ax%5E4+-x%5E3+%2Bx%5E2%2B2)
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化简[(2³-1)(3³-1)(4³-1)...(99³-1)(100³-1)]/[(2³+1)(3³+1)(4³+1)...(99³+1)(100³+1)]其值最接近于（）A.1/2 B.1/3 C.2/3 D.5/8另一题：分解因式：x^4 -x^3 +x^2+2
化简[(2³-1)(3³-1)(4³-1)...(99³-1)(100³-1)]/[(2³+1)(3³+1)(4³+1)...(99³+1)(100³+1)]
其值最接近于（）
A.1/2 B.1/3 C.2/3 D.5/8
另一题：分解因式：x^4 -x^3 +x^2+2
化简[(2³-1)(3³-1)(4³-1)...(99³-1)(100³-1)]/[(2³+1)(3³+1)(4³+1)...(99³+1)(100³+1)]其值最接近于（）A.1/2 B.1/3 C.2/3 D.5/8另一题：分解因式：x^4 -x^3 +x^2+2
选C
你可以设通项为(n^3-1)/(n^3+1),原式为n从2到100通项的乘积
∏(n^3-1)/(n^3+1)
=∏(n-1)[n(n+1)+1]/{(n+1)[(n-1)n+1]}
=∏[(n-1)/(n+1)]*∏{[n(n+1)+1]/[(n-1)n+1]}
={2/[n(n+1)]}{[n(n+1)+1]/(1*2+1)}
=(2/3){[n(n+1)+1]/[n(n+1)]}
[n(n+1)+1]/[n(n+1)]当n很大时,趋于1
∴(2/3){[n(n+1)+1]/[n(n+1)]}趋于2/3
另外你的第二题能在检查一下嘛,看看是否输入有误,
1加1等于几
有两个多边形,这两个多边形边数比3:5,内角和的度数比是1:2，求他们各自边数。