分母是1*3 3*5 5*7 7*9
x的(n+1)次方除以(2n-1)(2n+1)
x²/3、x³/15、x的4次方/35、x的五次方/63、x的6次方/99……依照此规律,第n个数据是?
x²/3、x³/15、x的4次方/35、x的五次方/63、x的6次方/99……依照此规律,第n个数据是?
数学人气：113 ℃时间：2019-10-17 00:53:09
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