Re: [中學] 分數乘法
※ 引述《biglongtoday (大長今)》之銘言：
: 想請問一題
: (1+1/(1+3))*(1+1/(2+4))*(1+1/(3+5))...*(1+1/(94+96))=?
: 拆解了一下 發現還是有點問題 麻煩各位了！
= 5/4 * 7/6 * 9/8 * ... * 191/190
191!
= -------------------------------
3! [2^94 * 95!]^2
191
= --------- * C(190, 95)
6 * 2^188
有什麼好看的形式嗎？
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 61.56.10.112
※ 文章網址: https://www.ptt.cc/bbs/Math/M.1506053433.A.5F6.html
推
09/22 13:45, , 1F
09/22 13:45, 1F
→
09/22 13:56, , 2F
09/22 13:56, 2F
→
09/22 14:49, , 3F
09/22 14:49, 3F
→
09/22 14:53, , 4F
09/22 14:53, 4F
→
09/22 15:16, , 5F
09/22 15:16, 5F
→
09/22 15:19, , 6F
09/22 15:19, 6F
討論串 (同標題文章)