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http://www.boredofstudies.org/courses/maths/3u/1139495242_2004_Mathematics_Extension_1_Trial_Paper.pdf Can anyone help me with Q 3 c) ii)? Also, can anyone help me with Q7 b)? Thanks in advance!

The numbers 1,2,3,4, .... , 9 are written on each of 9 cards, 3 of the cards are chosen at random. i) Find the probability that the sum of the three cards is equal to 9. For this part, I just collected the combination of numbers that yield 9: 1,2,6 1,3,5 1,5,3 1,6,2 2,1,6 2,3,4 2,4,3 2,6,1...

I never learnt how to find volume using simpsons' rule. Can any one help me on this? (page 7/8 Section C Q c.) http://www.boredofstudies.org/courses/maths/3u/1091817188_2004_Mathematics_Extension_1_Assessment_Task_sbhs.pdf I really cannot bother to do this question myself and I don't want to...

When you find the intersection between inverse functions, how do you come about approaching this? For example, if I have f(x) = square root of (x+6) and f-1(x) = x^2 - 6, I just substitutde f(x) value in for the x value in f-1(x). Would it be correct to do so?

http://www.boredofstudies.org/courses/maths/3u/2001_Maths3_T_CSSA_q.pdf Page 2/6 Question 2C. My working out is like the followings: There are 5 ways in which vowels can be separated. Those vowels can be arranged in 4!/2! ways The non-vowels can be arranged in 5!/2! ways. So I got: 5 ...

How did you guys go? What were your papers and how difficult were they in comparison to HSC past papers? Any extra thought? It's time to chat on this topic!

http://www.boredofstudies.org/courses/maths/3u/1095099280_2004_Mathematics_Extension_1_Trial_Paper_CSSA.pdf PAGE 6 last question (Q 7) of the CSSA paper. I don't understand the part ii and iii. Help will be appreciated. Thanks in advance. By the way, can anyone clarfy this for me...

I have problems with Q6 b) ii & iii page 9 And I don't understand Q7 b) ii) & iii) page 10 Thanks in advance. http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2005exams/pdf_doc/maths_ext1_05.pdf

Is it just me that the exam question here looks incomplete? http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2006exams/pdf_doc/maths_ext1_06.pdf Have a look at question 7 (a).

(ii) Use mathematical induction to prove that, for all integers n ≥1, tanθ tan 2θ+tan 2θ tan 3θ+ +tan nθ tan(n +1)θ=−(n +1))+cotθ tan(n +1)θ. Thi question is ridiculous in my opinion. You can not even prove that when n=1, the both side of the equation satisfies. So, I missed the first...

http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/maths-ex1-07.pdf Page 9 Q 6b) I have got no clue. Can anyone help me on this?

Find the exact values of x and y which satisfy the simultaneous equations sin-1x - cos-1y = pi/12 cos-1x +sin-1x = 5pi/12 I found the answers x = sqr(3)/2 and y = 1/sqr(2) but my working out took me quite a long time to work this out. Because I had to draw four diagrams to make entity...

http://www.boredofstudies.org/courses/maths/3u/1202628981_1990_Mathematics_Extension_1_Trial_Paper.pdf Page 13 Q3U89-2a)! I got the Part 1 right but I cannot work out the 2nd part. I don't know how to "show" even though I can explain why it's like this. Thanks in advance.

A metal bar has a temperature of 1340°C and cools to 1010°C in 12 minutes, when the surrounding temperature is 25°C. Find how much longer it will take the bar to cool to 60°C, giving your answer correct to the nearest minute.��* What's your answer to this? I got 150.5965769...

http://www.boredofstudies.org/courses/maths/3u/1202628981_1990_Mathematics_Extension_1_Trial_Paper.pdf Go to the page 4 and look at the question 3U96-7b)! I don't know how to get part ii and iii Thanks in advance. EDIT: Don't worry I just got it.

Did anyone hear about this particular program? I got selected by my school with my other mate to compete for places in this course but I am not really sure how I can apply for this course (i.e. what I need to hand in). I am pretty sure it's neither exam-based nor interview-based. Any...

Did anyone ever hear of this program? I was selected by my school (with my other mate) to compete for places for this program. Surprisingly, this is not exam-based so I do not know how they will be able to select people. Only thing that I can show is my result in Mathematics Competition...

Who write notes based on the syllabus here? I strictly follow syllabus when it comes to note-taking. But I am increasingly encountering problems in regards to this. It just seems to me that there are really important contents in the textbook that are not covered by syllabus, meaning that I...

I recently got an assignment where I need to make a model for the dissolution of glucose and sodium chloride in water. According to the marking criteria, I need to get bonding angles, accounts for non-shared electrons, 3-D model, polarity correect, orientation correct, intermolecular bonds...

A body is projected from a point on a horizontal plane reaches a greatest height h before hitting the plane R metres away from its point of projection. Show that the equation of the body's path may be expressed by y = [4hx(R-x)] / R^2 Sorry to bother you again. Thanks in advance.