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 SPM Students Discussion Thread V3, New Thread: End of an Era!!

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MildBluese
post Nov 27 2006, 01:02 AM

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QUOTE(~~5ive~~ @ Nov 27 2006, 01:00 AM)
x^2 - 3x - 4 = kx -2k
x^2 -3x - kx -4 +2k = 0

Then, HTP :
4+p = - (-3-k)
4+p = 3+k
p = k-1 ..... I

HDP:
4p = -4 +2k
Ganti I inside, 4(k-1) = -4+2k
4k -4 = -4+2k
2k=0
k=0

Ganti k=0 ke I
p=0-1
p=-1

so mean k=0, p=-1

right?
*
The answer is p= -1 and k = p + 1

Sorry i forgot to post the answer in my former post,'

This post has been edited by MildBluese: Nov 27 2006, 01:03 AM
~~5ive~~
post Nov 27 2006, 01:04 AM

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QUOTE(MildBluese @ Nov 27 2006, 01:02 AM)
The answer is p= -1 and k = p + 1

Sorry i forgot to post the answer in my former post,'
*
Nvm, so k=0, right?
Hhaha...so happy to solve it...
Got chen2 jiu4 gan3
Tm89
post Nov 27 2006, 01:04 AM

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kenot kenot..this wan not for this question..my bad xD
sumbody
post Nov 27 2006, 01:06 AM

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QUOTE(MildBluese @ Nov 27 2006, 12:50 AM)
For add maths experts, how do you do this? x.x

I have a feeling it's pretty simple but I'm not getting it.

user posted image
*
Punca: 4 dan p
(x+1)(x-4) = k(x-2)
x^2 - 4x + x - 4 = kx - 2k
x^2 - 3x - kx - 4 + 2k = 0
x^2 - (3+k)x - 4 + 2k = 0

(x-4)(x-p) = x^2 - px - 4x + 4p
x^2 - (p+4)x + 4p = 0

Bandingkan both persamaan
3+k = p+4
4p = -4 + 2k

Now its persaman serentak
k = p + 4 - 3 = p + 1
4p = -4 + 2(p+1)
4p = -4 + 2p + 2
4p = 2p - 2
2p = -2
p= -1

k = -1 + 1 = 0

Btw, the kaedah Hasil Tambah Punca and Hasil Darab Punca used above is correct also.

This post has been edited by sumbody: Nov 27 2006, 01:07 AM
~~5ive~~
post Nov 27 2006, 01:08 AM

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QUOTE(sumbody @ Nov 27 2006, 01:06 AM)
Punca: 4 dan p
(x+1)(x-4) = k(x-2)
x^2 - 4x + x - 4 = kx - 2k
x^2 - 3x - kx - 4 + 2k = 0
x^2 - (3+k)x - 4 + 2k = 0

(x-4)(x-p) = x^2 - px - 4x + 4p
x^2 - (p+4)x + 4p = 0

Bandingkan both persamaan
3+k = p+4
4p = -4 + 2k

Now its persaman serentak
k = p + 4 - 3 = p + 1
4p = -4 + 2(p+1)
4p = -4 + 2p + 2
4p = 2p - 2
2p = -2
p= -1

k = -1 + 1 = 0

Btw, the kaedah Hasil Tambah Punca and Hasil Darab Punca used above is correct also.
*
Ya....same actually...thousand of way to solve mt question.Haha. Jzu get the answer cna dy.
MildBluese
post Nov 27 2006, 01:09 AM

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^^ Ahh.. now I get it!

Thank you.
truecolor
post Nov 27 2006, 01:17 AM

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any1 knows how many marks we should get for bm in order to hav a 6C for it?
sumbody
post Nov 27 2006, 01:18 AM

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QUOTE(truecolor @ Nov 27 2006, 01:17 AM)
any1 knows how many marks we should get for bm in order to hav a 6C for it?
*
Around 50? Never thought much about anything below B3. Target higher ma. At least B3 la.
~~5ive~~
post Nov 27 2006, 01:21 AM

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QUOTE(sumbody @ Nov 27 2006, 01:18 AM)
Around 50? Never thought much about anything below B3. Target higher ma. At least B3 la.
*
yea, i think around 50 will have b3 then...
MildBluese
post Nov 27 2006, 01:28 AM

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How about add maths? x.x

I only know it's 8 marks to pass add maths. What about A1, A2, B3, B4 and so on?
~~5ive~~
post Nov 27 2006, 01:35 AM

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QUOTE(MildBluese @ Nov 27 2006, 01:28 AM)
How about add maths? x.x

I only know it's 8 marks to pass add maths. What about A1, A2, B3, B4 and so on?
*
A1 70 firm....65 c graph...others i not sure...aim for A1, everyone
elaineliew88
post Nov 27 2006, 01:35 AM

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QUOTE(MildBluese @ Nov 27 2006, 01:28 AM)
How about add maths? x.x

I only know it's 8 marks to pass add maths. What about A1, A2, B3, B4 and so on?
*
A1 is 60
A2 is 50-59
ptewee
post Nov 27 2006, 01:36 AM

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a1 shud be above 80... a2 65 - 79
elaineliew88
post Nov 27 2006, 01:37 AM

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QUOTE(truecolor @ Nov 27 2006, 01:17 AM)
any1 knows how many marks we should get for bm in order to hav a 6C for it?
*
well...bm is oway da hardest subject to get an A for it...but if 6c i think it should be in 55-59
elaineliew88
post Nov 27 2006, 01:38 AM

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QUOTE(ptewee @ Nov 27 2006, 01:36 AM)
a1 shud be above 80... a2 65 - 79
*
nop...usually add math they will pull down da standard....dat is y 8 mark already can pass...my year 60 ady get A1 smile.gif
~~5ive~~
post Nov 27 2006, 01:40 AM

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QUOTE(elaineliew88 @ Nov 27 2006, 01:38 AM)
nop...usually add math they will pull down da standard....dat is y 8 mark already can pass...my year 60 ady get A1  smile.gif
*
60? that low...how bout bm then?
elaineliew88
post Nov 27 2006, 01:42 AM

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QUOTE(~~5ive~~ @ Nov 27 2006, 01:40 AM)
60? that low...how bout bm then?
*
bm is high....but i think bm is depends ur luck...lol...coz my frenz trial exam all A1..but spm out his bm is B3...so dissapointed...while all da way my bm get A2 in trial but end up A1....to get A in bm...most important is used lot of peribahasa n simpulan bahasa in ur essay... smile.gif smile.gif
~~5ive~~
post Nov 27 2006, 01:43 AM

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QUOTE(elaineliew88 @ Nov 27 2006, 01:42 AM)
bm is high....but i think bm is depends ur luck...lol...coz my frenz trial exam all A1..but spm out his bm is B3...so dissapointed...while all da way my bm get A2 in trial but end up A1....to get A in bm...most important is used lot of peribahasa n simpulan bahasa in ur essay... smile.gif  smile.gif
*
is it...i use very les than...sweat. how bout length? u still remember how long u wrote?
elaineliew88
post Nov 27 2006, 01:45 AM

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QUOTE(~~5ive~~ @ Nov 27 2006, 01:43 AM)
is it...i use very les than...sweat. how bout length? u still remember how long u wrote?
*
ermm...i wrote quite long...i think is around 500 gua...i 4get ady...but i knw i wrote about sukan want...haha....
elaineliew88
post Nov 27 2006, 01:46 AM

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QUOTE(~~5ive~~ @ Nov 27 2006, 01:43 AM)
is it...i use very les than...sweat. how bout length? u still remember how long u wrote?
*
well...it is advisable not 2 wrote too long in essay as u wrote longer more mistake..... blush.gif
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