Re: [考古] 77交大管研
※ 引述《midarmyman (midarmyman)》之銘言：
: ※ 引述《i54360gbhdga (宏)》之銘言：
: : lim(h-->2)
: : cos(pi/h)/(h-2)
: : ans=pi/4
: by L'hopital law
: such that
: 原式= -sin(pi/h)*(-pih^(-2)) =pi/4 (h→2)
sol2:(順便練習用一下破英文@@)
let f(h) be a real function on Real line
such that f(h)=cos(pi/h) for all h belong to real number but 0 excluded
then the original limit could be wrtitten as below
f(h)-f(2)
lim ----------- = f'(2) = pi/4
h->2 h - 2
直接用羅畢達可能會被扣分...只是可能
這話沒有什麼依據XD
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※ 編輯: zptdaniel 來自: 123.194.100.216 (09/11 22:47)
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