請問這兩題怎麼證明? (微積分?

2019-09-22 3:40 pm

回答 (1)

2019-09-22 4:32 pm
✔ 最佳答案
39
a=lim(x->0)_x^4cos(2/x)
lim(x->0)_x^4>=A>=lim(x->0)_x^4*(-1)
0>=A>=0
A=0
40
A=lim(x->0+)_x^(1/2)[1+Sin^2 (2π/x)]
lim(x->0+)_x^(1/2)[1+1]>=A>= lim(x->0+)_x^(1/2)[1+0]
0>=A>=0
A=0
]


收錄日期: 2021-05-02 10:39:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190922074009AApqqqE

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