[羅必達] 請問這三題為何能用羅必達
1.
1 x 1
lim ---∫ sin(-----)dt
x→∞ x 0 1+t
2.
lim ln(sinx/x)
----------
x→0 x
3. 1 cost
lim x∫ -------
x→0+ x t平方
0 ∞
能用羅必達不是要確定 ----- 或-----嗎?
0 ∞
第一.三題我不知道為何能羅
第二題羅一次之後分子是∞-∞要怎麼判斷呢?
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