※ 引述《justin0602 (justin)》之銘言：
: http://ppt.cc/qaSt
a + b a + b
----- + ----- = 1
a b
=> (b/a) + (a/b) = -1
3x * ( (b/a) + (a/b) ) = 76
x = - 26
--
╬ ▃▃ ◢
◣
▄▄ ▄▄ ◥◣
▄▄ ╮ ◣
﹊ ＿ ▄ ▄ ◥◤
◣ ◢
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.42.170.134