Definite Integrals

👨🏻‍🏫 學術台數學

知識份子

2010-10-23 8:16 pm

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藍色是在下d完果樣...可以幫手睇下有無錯- -
在下唔係好識睇點先係 <0 or >0

更新1:

e^x , x^2-2x+2 must be postive, am i right? for the range 1<=x<=5 , x^3 should be postive!? then the ans of a) sould be overstimate(>0)?

更新2:

即是... 如果我想知佢係overstimate/understimate 就要好似你咁證到 f ''(x) 大過 / 細過 I 先得!?

回答 (2)

用戶9112

2010-10-23 9:30 pm

✔ 最佳答案

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2010-10-23 13:30:31 補充：
http://img836.imageshack.us/img836/9397/64353876.png

2010-10-23 20:54:21 補充：
First question : yes
Second question : yes
Third question : no
My third line, fourth line and fifth line show that the integral I is bigger than something
So that something is an underestimate of the integral of I

2010-10-24 22:32:43 補充：
是呀

👍 0 👎 0

wing hang

2010-10-23 8:25 pm

用咩方法estimate????

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