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My opinion? My teacher told me that in evaluate questions you have to make objective judgement based on objective information or facts...

Oh, "word", within the context of the probability questions asked in the HSC mathematics courses (including extension courses), is defined as any letters grouped next to each other. Don't you learn to read texts in thei contexts in the HSC english courses? You're meant to apply the skills you...

proper fraction is defined as... p/q where p and q have no common factors (remembering 1 and -1 aren't factors)

what u said was basically right. I was just making a technical point in that tk+1 technically must use nCk+1, but of course this technical point can be ignored (at least by most markers, I think). you'll get the same result :) And I also tried to point out the logic behind the rounding...

uh.. this doesn't connect to my question... BTW, I saw your post in another thread. What did you mean by "for women"? umm I guess your sex bit is intended for that thread... Are you drunk or something? oh this starts getting ridiculous.. shall we continue?

after some more extra inspection, Rorix's corrected solution at 08:13 PM Thursday is still wrong. after even more inspection and working backwards, Ive concluded that Archman sub sub x = sqrt(y * q^2) because: the new roots are 1/(a^2 b^2), 1/(b^2 c^2), 1/(a^2 c^2) which can all be...

?? is your post empty??? It doesn't really make sense to me... you treat the integral sign as an S but it doesn't affect your answer? I'll be suspicious

yes! I completely agree :)

but I wasn't trying to be funny!! anyone? if you believe me :confused: (hint) :confused:<br> How do you make it funnier?

integrate them of course ^_^ make some boundaries. Assuming you've graphed it, there are 4 intersections between (and including) pi/6 to 3/2pi right? You add up three integrals: 1. integrate from pi/6 to pi/2 where the two curves intersect (and if the integral turns out to be negative, take...

By inspection, there are 32 possible numbers. If repetition is allowed, you basically don't use the factorial notation just times, times and times (and use power if there are many letters) for ur Q, for the number to be even it must ends with either 4 or 8 right? choose: 1st digit * 2nd...

hmm.. interesting.. (no this time I'm being serious) how can it be used? like to solve what problems? BTW ND, if you don't mind... a,b,c are sides of a triangle. explain why (b-c)^2 <= a^2 Thanks.

no (-1)^0.5 * (-1)*0.5 is still (-1)^(2*0.5) = -1 So Xayma's method is still valid. And the binomial expansion method is invalid, because we can't have ^0.5C_k well maybe we can, I just haven't seen it. Now it's getting confusing... any help would be greatly appreciated.

Hmm.. I'm confused by the meaning of the key word "evaluate" From the Board of Studies document, evaluate means: "make a judgement based on criteria". So, say a question goes like this: "Evaluate the definite integral of sec^2(x) dx from x=pi/4 to x=pi/3" (2003 HSC 2 Unit Maths) Do we...

oh, so strong always win ^^ I remember my chemistry teacher saying strong base / acid always win over the weak base / acid, when determining the pH of a salt (like.. NaCl.. the Na comes from NaOH.. strong base.. the Cl comes from HCl... strong acid.. so nobody wins the the pH is pretty much 7)...

really?? I dont think Ive heard that.. :confused: can somebody explain?

oh please..... you dont need to do that. its a basic stuff which comes automatically by inspection :P modifying what ngai said.. or taking my own forced and false interpretation of his post, what he means is that you expand it to prove another thing. you assume it's true, and you use...

strictly speaking, if the sentence says: "divides externally in the ratio k : 1", k is positive. If the sentence says: "divides in the ratio k : 1" and it also says externally in another clause of the sentence (or in another sentence), k is negative. when you put k into the standard...

you'll get used to it ^_^ just remember the inspection technique along the way (it's partly true.. in some questions you need creative thinking and careful inspection)

Oh yes. Thanks!! :)