回复: English Chatroom (想练习英语的就来啊^^)
[隐藏内容]**** Hidden Message *****
回复: English Chatroom (想练习英语的就来啊^^)
Ahh,have to go now....I have just saw my teacher under the building....Wish you all have a nice day~
回复: English Chatroom (想练习英语的就来啊^^)
Hi Hiddern,glad to see you~Candy was online....
you can sometimes see me online but actually iam not reading the page
i would open the page but because of some parents problem i ll never got to see it~
so don't mind me
回复: English Chatroom (想练习英语的就来啊^^)
by the way, candy. I saw you have a math question on your posts. (Well, If you don't mind:030: :028:)I'll show you the step.I use "X" to express mutiply, and use "a" replace "x"
xxxxx(a+8)^(1/3)-2
lim _______________
a->0 xxxxx a
xxxxxxxxxx[(a+8)^(1/3)-2] xxxxxx[(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
=lim ____________________ X ____________________________________________
a->0 xxxxxxxxxxxa xxxxxxxxxxxxxx[(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
我先解释一下，这到题的关键是要先将分子有理化。
所以，要将分子变成 a^3-b^3的形式。Ps: a^3-b^3=(a+b)X( a^2+ab+b^2)
(sorry about this part, because I don't know who to explain this step in English:030:)
xxxxxxx[(a+8)^(1/3)-2] X [(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
= lim ____________________________________________________
xxa->0 xxx(a) X [(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
xxxxxxxx[(a+8)^(1/3)]^3 - 2^3
= lim ____________________________________________________
xxa->0 (a) X [(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
xxxxxxxxxxxxxxa+8-8
=lim ____________________________________________________
xxa->0 xxx(a) X [(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
since 8-8=0, and "a" at numerator could cancel the "a" at denominator.
Thus:
xxxxxxxxxxxxxxxxxxxxxxxxxx1
=lim ____________________________________________________
xxa->0 xxxxx(a) X [(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
Now, we can put a->0 in the whole equation.
xxxxxxxxxxxxxxxxx1
= lim ___________________________________
xxa->0x[(a+8)^(2/3) + 2(a+8)^(1/3) + 4]
= 1/12
That's it. he he........ :034::034:.Anyquestion on that?:015:
回复: English Chatroom (想练习英语的就来啊^^)
delete the 2nd part of nonsenses~ and you will never say something like that again~ or i won't ever talk to you~I will delete that part for you Candy, but... it's not because I'm scared of you, it's because I <3 U, okay? I want you to be my friends.
回复: English Chatroom (想练习英语的就来啊^^)
by the way, candy. I saw you have a math question on your posts. (Well, If you don't mind:030: :028:)I'll show you the step.I use "X" to e...
You did well, 70. I thank you.
回复: English Chatroom (想练习英语的就来啊^^)
gotta to go work TAT....Hi, there. You're just like Mel, having to much work to do on weekends.
回复: English Chatroom (想练习英语的就来啊^^)
nicely done, gunners....-v-.....回复: English Chatroom (想练习英语的就来啊^^)
nicely done, gunners....-v-.....Who are gunners, Big Dudu?
回复: English Chatroom (想练习英语的就来啊^^)
Almunia, eboue, clichy, toure, gallas, hleb, flamini, gilberto, fabregas, van persie, henry and arsene wenger are the gunners of today....回复: English Chatroom (想练习英语的就来啊^^)
I will delete that part for you Candy, but... it's not because I'm scared of you, it's because I <3 U, okay? I want you to be my friends.i don't like ppl who are mean~i won't ever be friends with them~
回复: English Chatroom (想练习英语的就来啊^^)
by the way, candy. I saw you have a math question on your posts. (Well, If you don't mind:030: :028:)I'll show you the step.I use "X" to e...
thank you ><got it now~
and that formate looks so beautiful~~ :027:
回复: English Chatroom (想练习英语的就来啊^^)
Almunia, eboue, clichy, toure, gallas, hleb, flamini, gilberto, fabregas, van persie, henry and arsene wenger are the gunners of today....I know Henry, but have never heard of the rest. What team are they in?
回复: English Chatroom (想练习英语的就来啊^^)
the gunners are always together, if you only know thierry, there's no need to mention the club回复: English Chatroom (想练习英语的就来啊^^)
i don't like ppl who are mean~ i won't ever be friends with them~That's okay, I'm not "people". So can we be friends now? And also I'm mean to you, because you're meaningful to me, get it?
回复: English Chatroom (想练习英语的就来啊^^)
[隐藏内容]thas cool! thx^^
回复: English Chatroom (想练习英语的就来啊^^)
That's okay, I'm not "people". So can we be friends now? And also I'm mean to you, because you're meaningful to me, get it?:029:please get your lips off her butt...that's very not pleasing to the eyes:026:
回复: English Chatroom (想练习英语的就来啊^^)
to rationalize the numerator^^wow, that was cool~!!~!! i suck at calculus....
Yes, indeed.
回复: English Chatroom (想练习英语的就来啊^^)
[隐藏内容]
:013:hmm, i know
回复: English Chatroom (想练习英语的就来啊^^)
:029:please get your lips off her butt...that's very not pleasing to the eyes:026:It's okay, Big Dudu. I think a smart people like you can see or understand everything with your eyes closed.