Friday, March 15, 2013
Saturday, June 18, 2011
Monday, May 16, 2011
Sunday, April 10, 2011
Hari Pertama Di Kelas Malam
Posted by
Idil Rosdi
at
7:35 AM
suasana yg indah di dlm kelas...mlm ni ialah subjet kimia...
februt tuu...hehe..best jgop laa blaja kimia mlm2,,masuk otop,
,skalo gk,,masuk skit,,tbik bnyok..hmm..mcm isotop la plop..
kiki...bkpo ehh skoloh x wt d wktu mlm..?ak rsa lbih sdap mlm...
suasano merioh..pmndangan indh...kiki..hmmm
xpo lh...nk wt gno dh...tggu ak jd krajaan ,,ak wt laa kllass alik mlm...hahahaha
februt tuu...hehe..best jgop laa blaja kimia mlm2,,masuk otop,
,skalo gk,,masuk skit,,tbik bnyok..hmm..mcm isotop la plop..
kiki...bkpo ehh skoloh x wt d wktu mlm..?ak rsa lbih sdap mlm...
suasano merioh..pmndangan indh...kiki..hmmm
xpo lh...nk wt gno dh...tggu ak jd krajaan ,,ak wt laa kllass alik mlm...hahahaha
Thursday, March 31, 2011
Intergration
Posted by
Idil Rosdi
at
8:13 PM
If y3 = x, how would you differentiate this with respect to x? There are three ways:
dx = 3y2dy
So we get:
dy = 1
dx 3y2
Method 3 Differentiate term by term and use the chain rule:
y3 = x
The right hand side of this equation is 1, since the derivative of x is 1. However, to work out the left hand side we must use the chain rule.
The left hand side becomes:
d (y3) × dy
dy dx
(although it is not strictly correct to do so, at this level you can think of dy/dx as a fraction in the chain rule. In the line above, imagine that you can cancel the "dy" s, leaving d/dx and y3, which is what we had in the previous line).
Therefore, 3y2 × dy = 1
dx
So dy = 1
dx 3y2In this example, method (2) is probably the easiest. However, there are cases when the only possible method is (3).
2x + d (y2)×dy = 3
dy dx
2x + 2y dy = 3
dx
dy = 3 - 2x
dx 2y
You might be tempted to write xax-1 as the answer. This is wrong. That would be the answer if we were differentiating with respect to a not x.
Put y = ax .
Then, taking logarithms of both sides, we get:
ln y = ln (ax)
so ln y = x lna
So, differentiating implicitly, we get: (1/y) (dy/dx) = lna
and so dy/dx = y lna = ax lna
(copy) ::D
jom blajar..
Method 1
Rewrite it as y = x(1/3) and differentiate as normal (in harder cases, this is not possible!)Method 2
Find dx/dy:dx = 3y2dy
And now use the fact: | dy | = |
1
|
dx | dx/dy |
So we get:
dy = 1
dx 3y2
Method 3 Differentiate term by term and use the chain rule:
y3 = x
d | (y3) | = | d | (x) |
dx | dx |
The right hand side of this equation is 1, since the derivative of x is 1. However, to work out the left hand side we must use the chain rule.
The left hand side becomes:
d (y3) × dy
dy dx
(although it is not strictly correct to do so, at this level you can think of dy/dx as a fraction in the chain rule. In the line above, imagine that you can cancel the "dy" s, leaving d/dx and y3, which is what we had in the previous line).
Therefore, 3y2 × dy = 1
dx
So dy = 1
dx 3y2In this example, method (2) is probably the easiest. However, there are cases when the only possible method is (3).
Example
Differentiate x2 + y2 = 3x, with respect to x.d | (x2) | + | d | (y2) | = | d | (3x) |
dx | dx | dx |
2x + d (y2)×dy = 3
dy dx
2x + 2y dy = 3
dx
dy = 3 - 2x
dx 2y
Example
Differentiate ax with respect to x.You might be tempted to write xax-1 as the answer. This is wrong. That would be the answer if we were differentiating with respect to a not x.
Put y = ax .
Then, taking logarithms of both sides, we get:
ln y = ln (ax)
so ln y = x lna
So, differentiating implicitly, we get: (1/y) (dy/dx) = lna
and so dy/dx = y lna = ax lna
(copy) ::D
jom blajar..
Friday, March 18, 2011
My Love Song (simple plan)
Posted by
Idil Rosdi
at
10:53 AM
Hey Dad look at me
Think back and talk to me
Did I grow up according
To plan?
Do you think I’m wasting
My time doing things I
Wanna do?
But it hurts when you
Disapprove all along
And now I try hard to make it
I just want to make you proud
I’m never gonna be good
Enough for you
I can’t pretend that
I’m alright
And you can’t change me
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
I try not to think
About the pain I feel inside
Did you know you used to be
My hero?
All the days
You spent with me
Now seem so far away
And it feels like you don’t
Care anymore
And now I try hard to make it
I just want to make you proud
I’m never gonna be good
Enough for you
I can’t stand another fight
And nothing’ alright
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
Nothing’s gonna change
The things that you said
Nothing’s gonna make this
Right again
Please don’t turn your back
I can’t believe it’s hard
Just to talk to you
But you don’t understand
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
Think back and talk to me
Did I grow up according
To plan?
Do you think I’m wasting
My time doing things I
Wanna do?
But it hurts when you
Disapprove all along
And now I try hard to make it
I just want to make you proud
I’m never gonna be good
Enough for you
I can’t pretend that
I’m alright
And you can’t change me
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
I try not to think
About the pain I feel inside
Did you know you used to be
My hero?
All the days
You spent with me
Now seem so far away
And it feels like you don’t
Care anymore
And now I try hard to make it
I just want to make you proud
I’m never gonna be good
Enough for you
I can’t stand another fight
And nothing’ alright
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
Nothing’s gonna change
The things that you said
Nothing’s gonna make this
Right again
Please don’t turn your back
I can’t believe it’s hard
Just to talk to you
But you don’t understand
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
‘Cuz we lost it all
Nothing lasts forever
I’m sorry
I can’t be Perfect
Now it’s just too late
And we can’t go back
I’m sorry
I can’t be Perfect
Sunday, March 13, 2011
Hidup Dengan Blog..
Posted by
Idil Rosdi
at
9:37 AM
berdasarkn tajuk diatas,,,,blog ini membincang kn tntang2 hidup ku yg slalu membuat blog...moneatise blog dengan adsense....huhuhu...ad stengah org je kot yg thu semo nih...hehe...tp,,klu ore pnda,,,duit laaa jwapan dya...adsense ni xsene tp xpyoh,,...klu nk tgok blog2 adsense sy klik lah dibawah...
blog 1
blog2
blog3
blog4 cari prkataan kecil Ads by google then klik..
dan banyk lagi...haha..dalm maso 1 bulan bleh buat 10 blog...haha...adsense ni sejenis iklan yg tdak berbapa...wakakakaka....if sombdy klik on your ads,u will be paid from google...if u want to learn,ask to me,,,...i can teach you as will posible....
blog 1
blog2
blog3
blog4 cari prkataan kecil Ads by google then klik..
dan banyk lagi...haha..dalm maso 1 bulan bleh buat 10 blog...haha...adsense ni sejenis iklan yg tdak berbapa...wakakakaka....if sombdy klik on your ads,u will be paid from google...if u want to learn,ask to me,,,...i can teach you as will posible....
Subscribe to:
Posts (Atom)