TYS 'O' LVL maths question

gunner77 SG

(a) solve the equation (2a-3)^2 = 16

(b) y is directly proportional to x^2

x is increase by 100%

find the percentage increase in y

tin tin help me with part B

my friend also donno

tinuviel07 SG

300% is it

gunner77 SG

the answer is 400%

tinuviel07 SG

e qn so short ah? but they must give scenario ma

gunner77 SG

so something wrong with the question?

scissors paper stone again?

tinuviel07 SG

hmmmm let me see

tinuviel07 SG

i think so leh.. brain not functioning for this qn

gunner77 SG

kk nvm

confirm got problem

UltimaOnline SG

I actually didn't read this thread since it says "Maths", but I just popped in randomly, and noticed gunner77 asking tinuviel07 ("tin tin") some Chem questions.

Just to comment that, if you'd like the input of others (eg. myself), it would probably be a better idea to discuss Chem questions in a "Chem" thread, rather than a "Math" thread.

>>> acid and alkali ---> neutralisation takes place so no change. like tat also can? <<<

The statement "neutralisation takes place so no change" is not sufficient (as tinuviel07 has similarly implied), you have to elaborate on what actually happens during neutralization to explain why the oxidation state of the various species do not change during neutralization.

I'll leave this thread now. If anyone on the forum is interested in a Chem discussion, I would suggest he/she start a Chem thread; it would be more organized, rather than discussing Chem qns in a Maths thread, yes?

(And in case gunner77 is interested in discussing only with tinuviel07, that's also perfectly ok, of course.)

tinuviel07 SG

sounds so wrong.. :p i charge a lot for one on one discussion

gunner77 SG

I actually didn't read this thread since it says "Maths", but I just popped in randomly, and noticed gunner77 asking tinuviel07 ("tin tin") some Chem questions.

Just to comment that, if you'd like the input of others (eg. myself), it would probably be a better idea to discuss Chem questions in a "Chem" thread, rather than a "Math" thread.

>>> acid and alkali ---> neutralisation takes place so no change. like tat also can? <<<

(And in case gunner77 is interested in discussing only with tinuviel07, that's also perfectly ok, of course.)

ultima i notice u are a good chemistry helper

dont worry i will start a thread on chem

definetely need alot of ppl to help me

not only tin tin.

tinuviel07 SG

sad :(

gunner77 SG

the more the merrier wat

eagle SG

A maths binomial theorem:

Write down and simplify the first three terms in the expansion of (1 - 2x)⁸ in ascending powers of x. Given that the first three terms in the expansion of (1 - ax)² (1 - 2x)⁸ are 1, -8x, and bx², calculate the values of a and b.

tinuviel07 SG

i thought only in ssf?

Garrick_3658 SG

A maths binomial theorem:

lol you sure you posting this in the right place? examworld's probably more suitable.

And this question is, in fact, one of the most seen questions in the o levels. I practise this type of question (only numbers change nia) until sian liao. Now I see this question, it's like super duper easy to me...

Ahm97sic SG

Hi Garrick_3658,

Yes, you have done very well in your preparation for the coming "O" level exam. Indeed, teachers like to hear the students says that "it is so easy, I know the steps to solve this type of question" as this means that the students have already mastered the ability to identify and solve the different patterns set for each topic in the ten years series and these students will almost get A1 or A2 without making careless mistakes in their "O" level exam.

Thank you for your kind attention.

Regards,

ahm97sic

xXBlack_RebelXx SG

damn this thread is so long, now I have to read all of this. Damn. >.<

davidche SG

damn this thread is so long, now I have to read all of this. Damn. >.<

lol

gunner77 SG

17(a) y is proportionalto x^n

write down the value of n when

(i) y cm^2 is the area of a circle of radius x cm

(ii) y hours is the time taken to travel a distance x km at a constant speed

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