查看完整版本 : Simpson's rule+ trapezoidal rule +log

戰車仔 2014-11-12 11:35 PM

Simpson's rule+ trapezoidal rule +log

3. Find the area bounded by x =0.3,x=1.44, y=(a+b sinx+c cos x)^1/2
a=2.4,b=2.8,c=2.1
Find the area bounded by dividing 3 strips
Find the area bounded by dividing into 6 strips and using the more accurate method
Hence find the volume generated by revolving y about x axis and using 6 strips (more accurate method)

呢題,D=1.44-0.3/3=0.38,X=0.3,0.68,1.06,1.44,而Y就分別SUB X入Y,照X0.5,1,1,0.5,A+埋總數TOTAL再*0.38,但個數都係唔岩

5. In a chemical reaction, the amount of product P(t)=14.7e^0.1t -3
The amount of reactant  R(t)=243-e^0.2t
Find when the reation is in equilibrium state, when the product is half that of the reactant.

係咪2(14.7e^0.1t -3) = 243-e^2bt 咁樣計?但唔岩
求方向,THANKS

[7] 2014-11-12 11:53 PM

回覆 1# 的帖子

3.你....寫下你每步計了甚麼才知你有咩唔o岩...area 同volume both計唔倒?
   if you r drilling by hand,then tell us what u get,say by a table, n what is the answer and the model answer?if u r dating with a graphic cal.        say Tx-something, then share us your program, ty.

5....都係個句,你的step,pls。你計倒幾多,佢答案幾多?

[[i] 本帖最後由 [7] 於 2014-11-13 09:58 AM 編輯 [/i]]

戰車仔 2014-11-13 12:02 AM

[quote]原帖由 [i][7][/i] 於 2014-11-12 11:53 PM 發表 [url=http://www.discuss.com.hk/redirect.php?goto=findpost&pid=402332308&ptid=24019517][img]http://www.discuss.com.hk/images/common/back.gif[/img][/url]
3.你....寫下你每步計了甚麼才知你有咩唔o岩...area 同volume both計唔倒?

5....都係個句,你的step,pls。你計倒幾多,佢答案幾多? [/quote]
3. 我照SUB,再用正常個RULE 都計唔到,
5. 我用咁既方向計,但答案唔岩

十個MC 答案,同自己答案唔吻合....

[7] 2014-11-13 12:05 AM

回覆 3# 的帖子

列哂你的計算,才可check到啊

[7] 2014-11-13 12:15 AM

[quote]原帖由 [i]戰車仔[/i] 於 2014-11-13 12:02 AM 發表 [url=http://www.discuss.com.hk/redirect.php?goto=findpost&pid=402333060&ptid=24019517][img]http://www.discuss.com.hk/images/common/back.gif[/img][/url]

3. 我照SUB,再用正常個RULE 都計唔到,
5. 我用咁既方向計,但答案唔岩

十個MC 答案,同自己答案唔吻合.... [/quote]

3.會唔會係個[img]http://latex.codecogs.com/gif.latex?\sin[/img]同[img]http://latex.codecogs.com/gif.latex?\cos[/img]在計算機中未轉rad?

   [img]http://latex.codecogs.com/gif.latex?\\\vspace{5pt}\text{If u don't mind, pls fill up the table with the cal. in }Rad\text{ mode.}\\\vspace{5pt}\text{And also }y=\sqrt{2.4+.2.8\sin x+2.1\cos x}\\\indent\hspace{50pt}\left|\;\begin{matrix}\hline\text{variable}\setminus\text{point no.} \\\hline x\\\hline y\\\hline y^2\\\hline\end{matrix}\;\right.\left|\begin{matrix}\hline \:\:\:\:\:\:0\:\:\:\:\:\\\hline\\\hline\\\hline\\\hline\end{matrix}\right.\begin{vmatrix}\hline \:\:\:\:\:\:1\;\:\:\:\:\:\\\hline\\\hline\\\hline\\\hline\end{vmatrix}\left.\begin{matrix}\hline \,\:\:\:\:\:2\,\:\:\:\:\:\\\hline\\\hline\\\hline\\\hline\end{matrix}\right|\left.\begin{matrix}\hline \,\:\:\:\:\:3\,\:\:\:\:\:\\\hline\\\hline\\\hline\\\hline\end{matrix}\right|\left.\begin{matrix}\hline \,\:\:\:\:\:4\,\:\:\:\:\:\\\hline\\\hline\\\hline\\\hline\end{matrix}\right.\;.....[/img]

5.會唔會你解錯?

   [img]http://latex.codecogs.com/gif.latex?\\\vspace{5pt}\text{ \,\,\,\,\,R u having sth like this? how u solve it?}\\\indent\hspace{20pt} e^{0.2t}+29.4e^{0.1t}-249=0\\[/img]

[[i] 本帖最後由 [7] 於 2014-11-13 09:32 AM 編輯 [/i]]

戰車仔 2014-11-13 10:06 AM

四個數都乘pi?



[url=http://m.discuss.com.hk][img=100,23]http://n2.hk/d/images/r10/mobile.jpg[/img][/url]

[7] 2014-11-13 07:30 PM

[quote]原帖由 [i]戰車仔[/i] 於 2014-11-13 10:06 AM 發表 [url=http://www.discuss.com.hk/redirect.php?goto=findpost&pid=402352882&ptid=24019517][img]http://www.discuss.com.hk/images/common/back.gif[/img][/url]
四個數都乘pi?



[img]http://n2.hk/d/images/r10/mobile.jpg[/img] [/quote]唔使,你知道甚麼是rad mode嗎?

陳一隆 2014-11-13 09:15 PM

aaaaaaaaaaaaaaaaaaaaaaa:) :) :)

戰車仔 2014-11-17 11:00 AM

chemical reaction 個題,列式係咪解為2(P)t=(R)t嗎



[url=http://m.discuss.com.hk][img=100,23]http://n2.hk/d/images/r10/mobile.jpg[/img][/url]

戰車仔 2014-11-17 11:01 AM

chemical reaction 個題,列式係咪解為2(P)t=(R)t嗎



[url=http://m.discuss.com.hk][img=100,23]http://n2.hk/d/images/r10/mobile.jpg[/img][/url]

[7] 2014-11-17 11:16 AM

[quote]原帖由 [i]戰車仔[/i] 於 2014-11-17 11:01 AM 發表 [url=http://www.discuss.com.hk/redirect.php?goto=findpost&pid=402651865&ptid=24019517][img]http://www.discuss.com.hk/images/common/back.gif[/img][/url]
chemical reaction 個題,列式係咪解為2(P)t=(R)t嗎



[img]http://n2.hk/d/images/r10/mobile.jpg[/img] [/quote]是。之後你得到我說的那式嗎?

戰車仔 2014-11-17 02:00 PM

姐係set 做quadratic equation, 再找出答案



[url=http://m.discuss.com.hk][img=100,23]http://n2.hk/d/images/r10/mobile.jpg[/img][/url]

[7] 2014-11-17 02:13 PM

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查看完整版本: Simpson's rule+ trapezoidal rule +log