in the end also must use calc....where's the question-er?

aiyoh.. dun post answer only ar.. post jalan too.. its a kertas 2 soalan.. need to know how to done it

bluhapp got the answers or not?

my answer very got problem.

This post has been edited by DeathChaosX: Nov 26 2006, 02:32 AM

a) Nilai K
Fungsi Kecerunan = k - 2x
AB: y = 4 - x

k - 2x ialah kecerunan tangen
Daripada y = 4 - x, kecerunan ialah -1
maka, k - 2x = -1
(1,3) Gantikan x=1 ke dalam k - 2x
k-2(1) = -1
k = -1 + 2 = 1

b) Persamaan Lengkung
Kamirkan k - 2x untuk dapatkan persamaan lengkung
k - 2x = 1 - 2x

Kamirkan 1 - 2x
x - [(2x)^2]/2 + c
= x - x^2 + c

Gantikan (1,3) ke dalam Persamaan
y = x - x^2 + c
3 = 1 - 1^2 + c
c = 3
maka, y = x - x^2 + 3 ialah Persamaan Lengkung

c) Luas kawasan berlorek
Luas di bawah garis - Luas di bawah lengkung = Luas kawasan berlorek

Luas di bawah garis
y = 4 - x
Apabila x = 0, y = 4 - 0 = 4
A: (0,4)
Apabila y = 0, 0 = 4 - x
x = 4
B: (4,0)
Luas ialah 0.5 X 4 X 4 = 8 [Menggunakan rumus mengira luas segi tiga]

Luas di bawah kawasan berlorek
y = -x^2 + x + 3
Apabila y=0
0 = -x^2 + x + 3
Didapati x = -1.3028 atau 2.3028
Kamirkan y = -x^2 + x + 3 dengan had 0 hingga 2.3028

*I think I made some mistakes.... Shouldn't be so complicating answers

Correct me if I'm wrong

This post has been edited by sumbody: Nov 26 2006, 02:30 AM

all i aso duno do lo! prepare to die in addmath lu.. >.<

add maths is one of my worse subject ever... cant ever understand it.. maybe janjang and form4 early chapters can remember.. maybe also form5 early chapters... the rest cant remember...

Evrtime I do exercises on revision books and wanna try out my new "skill" on a real paper(the previous SPM papers), the questions are damn TWISTED!!

I only get 35/80 in the end for paper 1.

5more days to go and we will rock the world

man.. hope add maths faster ovver.. moral also.. the rest juz relax nia..

wah... u so pro meh?.... wad abt kim fiz and bio?

I am worried about moral and the experiments. Add maths is ok to me. A lot of states spot the 'getah tervulkan' for chem and I guess the MES will change the paper. =[

hey, if everyone's here lets go to the dalnet chatroom on mirc... channel #spm2006

Nobody there cept you and me.

if then how to chat and discuss?? anyone free pls go in lah...

i do the pass year addmath question.1 hour onli done few question!swt..

oops there is a mistake in my question, its lg3 only not 2lg3, and there is an extra lg21 also, was too hurry when im typing the question, my bad...

2lg2 - lg3 + lg21 + 2lg5 - lg7
= lg4 - lg3 + lg21 + lg25 - lg7
= lg(4/3 x 21 x 25/7)
= lg100
= 2

i got many more log question but i dunno how to type it here, dunno how to type the asas...

This post has been edited by lightbringer: Nov 26 2006, 11:59 AM

Same here. I have to refer to the reference book everytime I do add maths questions.

without calculator how to do?? need use alot time to X and / to get lg100. and y ur all noe lg100 =2 ? formula??

lg = log asas 10

lg100 = log10 100