→ pobm:隨便寫你就隨便看吧 140.114.212.38 12/20 11:15
推 yuyumagic424:(sec z)^2 > 1 140.112.243.42 12/20 22:24
※ 編輯: pobm 來自: 218.166.145.135 (12/21 02:09)
※ 引述《bitchdog (PEaCE)》之銘言：
: x,y 介於0和 π/2之間 ，試證 | tanx-tany|>=|x-y|
均值定理
if f(x) is conti and diffe in [a,b]
f(b)-f(a)
-------------=f'(c) for some c belong in [a,b]
b-a
|tanx-tany|
--------------= (sec z)^2 > 1 for some z belong in [x,y]
|x-y|
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