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我有一个找不到答案的问题:
f(n)=(2n*f(n-1))/(n-1)+(3n*f(n-2))/(n-2)
domeone可以帮助我吗?
感谢您的帮助
我试过这样的东西..
Let y = f(n)/n
从中我得到方程ny = (2*n - y(n-1))/( n- 1 + 3ny)
ny = (2*n - y(n-1))/( n- 1 + 3ny)
这是 y 的二次方,最后用 f(n)/n 替换 y。
希望这是正确的。:-)