BD 的斜率是-1/B², xy=1 過A點的切線的斜率是什麽?
這兩條直線什麽關係?
BD 的斜率是-1/B², xy=1 過A點的切線的斜率是什麽?
這兩條直線什麽關係?
• 可能有誤解,我拿了筆,是不大糊塗大的. -jinjing- ♀ (0 bytes) () 07/03/2011 postreply 10:04:32
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