→ NCWW :a,b夠乖的話, (1+a(x))^b(x) --> exp(a(x)*b(x))08/07 13:40
tanx / x = 1 + x^2 / 3 + O(x^5) as x -> 0
lim ( 1 + x^2/3 + O(x^5) )^( 1/x^2 )
x->0
= exp ( lim 1/3 + O(x^5)/x^2 ) = exp( 1/3 )
x->0
(不過怎樣叫做夠乖阿XD)
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推 steve1012 :不會跑到無限大? 08/07 16:51