Recent content by AlvinCY

I can't draw diagrams online, so I did it on word and made a pdf, enjoy! http://www.geocities.com/alvin_cy_mak/Ans.pdf TA!

An even function follows the rule of: f(x) = f(-x) :-) So most of the time it's x raised to even powers, but you can get functions which are even, when it's not just an x raised to some power. e^2x is a good example. But yeh, I think referring to polynomials, it's often just x raised to even...

I've put my answer onto a PDF... I can't draw diagrams on BoS Enjoy. http://www.geocities.com/alvin_cy_mak/answer.pdf Try that.

Re: The best physics textbook There's no guarantee for Prelim textbooks to be good or not, not many people at my school used textbooks for prelim. We were however, given a textbook, I believe it was a McMillan textbook. Don't think I found that very useful at all. I stuck with my Excel study...

Q1) ABCD is a triangular pyramid with BC = 5m, CD =8m, BD = 11m, AB =AC and /_ACB = 78 Degrees a) Find /_BCD b) length AB (to nearest metre) a) This question requires basic cosine rule, which states that: cos C = (a² + b² - c²) / (2ab), so by substitution and using ∆BCD cos...

Haha... pardon me. Yes, you're quite right, but regardless, A and -B would yield the same solution. (Where A and B are both positive numbers... or both negative... that way, A and -B are always opposite in sign, and doesn't matter whether A is negative or B is) So yes, -AB, same argument...

Another way of looking at it is this: a) let the roots be A and – A , the sum of roots would prove b = 0 b) let the roots be A and 1/A, the product of roots would give you c = a c) let the roots be A and - A, then the product of roots is -A² = c/a, since -A² is always...

For the first question, this is my guess: rt3 + i is one root of x⁴ + cx² + e = 0, where c and e are real. Find c and e, and factor x⁴ + cx² + e into quadratic factors with real coefficients. I’m assuming rt3 means root 3, and I’m going to use ./ for a root. ./3 + i is a...

The way you guys have done it, probably a good idea to check if the solution will give cos x = 0, which I don't think it does, cos in the process you've divided both sides by a cos x... and you should be careful not to devide by 0. I've done it using the auxiliary angles method: I’m using a...

Despite the complexity of the question by first glance, once you sit down with a piece of paper, you'll actually kick yourself, watch: If one root of the eqn x³ - bx² + cx - d = 0 is equal to the product of the other two, show that (c+d)² = d(b+1)² Let the roots be A, B, AB; you know then by...

Hahaha! so am I glad I didn't get the lift from you? :-P When'd you guys get going this morning? Lego.

Haha. EDUF1018 exams are the same every year, so seriously find the past papers to the last few years and you're bound to find a question that is similar.

LoL. I'm in Second year, does that count? Anyway, I'm a mentor for the first years for this degree, so if you have any questions with course structures, feel free to PM me. Lego

Girraween!! 37TH! Hey! Not bad for a small selective school