{"problem":{"name":"再求 f(x,n)","description":{"content":"已知 $f(x,n)=\\dfrac{x}{n+\\dfrac{x}{(n-1)+\\dfrac{x}{(n-2)+\\dfrac{\\vdots}{\\cdots+\\dfrac{x}{1+x}}}}}$。 用递归函数求解。","description_type":"Markdown"},"platform":"Luogu","limit":{"time_limit":1000,"memory_limit":131072},"difficulty":{"LuoguStyle":"P1"},"is_remote":true,"is_sync":true,"sync_url":null,"sign":"LGB2148"},"statements":[{"statement_type":"Markdown","content":"已知\n\n$f(x,n)=\\dfrac{x}{n+\\dfrac{x}{(n-1)+\\dfrac{x}{(n-2)+\\dfrac{\\vdots}{\\cdots+\\dfrac{x}{1+x}}}}}$。\n\n用递归函数求解。\n\n## Input\n\n第一个数是 $x$ 的值，第二个数是 $n$ 的值。（$x$ 为**实数**，$n$ 为整数）\n\n## Output\n\n函数值，保留两位小数。\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"LGB2148","tags":["函数与递归"],"sample_group":[["1\n2","0.40"]],"created_at":"2026-03-03 11:09:25"}}