观察找规律:观察找规律:1/3,2/8,3/15,4/24,……,根据规律,这组数第n个数字与第(n-1)个数字之积的结果是()A.2n+3/(n^2+3n+2)B.1/(n^2+3n+2)C.1/(n^2+n-2)D.1/(n^2+n+2)
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![观察找规律:观察找规律:1/3,2/8,3/15,4/24,……,根据规律,这组数第n个数字与第(n-1)个数字之积的结果是()A.2n+3/(n^2+3n+2)B.1/(n^2+3n+2)C.1/(n^2+n-2)D.1/(n^2+n+2)](/uploads/image/z/263090-2-0.jpg?t=%E8%A7%82%E5%AF%9F%E6%89%BE%E8%A7%84%E5%BE%8B%EF%BC%9A%E8%A7%82%E5%AF%9F%E6%89%BE%E8%A7%84%E5%BE%8B%EF%BC%9A1%2F3%2C2%2F8%2C3%2F15%2C4%2F24%2C%E2%80%A6%E2%80%A6%2C%E6%A0%B9%E6%8D%AE%E8%A7%84%E5%BE%8B%2C%E8%BF%99%E7%BB%84%E6%95%B0%E7%AC%ACn%E4%B8%AA%E6%95%B0%E5%AD%97%E4%B8%8E%E7%AC%AC%EF%BC%88n-1%EF%BC%89%E4%B8%AA%E6%95%B0%E5%AD%97%E4%B9%8B%E7%A7%AF%E7%9A%84%E7%BB%93%E6%9E%9C%E6%98%AF%EF%BC%88%EF%BC%89A.2n%2B3%2F%28n%5E2%2B3n%2B2%29B.1%2F%28n%5E2%2B3n%2B2%29C.1%2F%28n%5E2%2Bn-2%29D.1%2F%28n%5E2%2Bn%2B2%29)
观察找规律:观察找规律:1/3,2/8,3/15,4/24,……,根据规律,这组数第n个数字与第(n-1)个数字之积的结果是()A.2n+3/(n^2+3n+2)B.1/(n^2+3n+2)C.1/(n^2+n-2)D.1/(n^2+n+2)
观察找规律:
观察找规律:1/3,2/8,3/15,4/24,……,根据规律,这组数第n个数字与第(n-1)个数字之积的结果是()
A.2n+3/(n^2+3n+2)
B.1/(n^2+3n+2)
C.1/(n^2+n-2)
D.1/(n^2+n+2)
观察找规律:观察找规律:1/3,2/8,3/15,4/24,……,根据规律,这组数第n个数字与第(n-1)个数字之积的结果是()A.2n+3/(n^2+3n+2)B.1/(n^2+3n+2)C.1/(n^2+n-2)D.1/(n^2+n+2)
答案是 B 第N个数的表达式是n/ (n^2+2n)