Can some1 show me the proof of inverse function rule, dy/dx = 1 / (dx/dy) ?
thanks
proof of inverse function rule (urgent)?
2011-06-08 3:17 pm
回答 (1)
2011-06-08 5:00 pm
✔ 最佳答案
Let y=f(x) and the inverse function be x=g(y). Then y=f(g(y)) and by the chain ruledy/dy = f' g' and so, as dy/dy=1, f' = 1/ g' or dy/dx = 1 / (dx/dy)
收錄日期: 2021-04-20 00:46:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110608071712AATdg3w