Answer: a=5, r =1.5
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Here was my attempt:
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I also get the feeling this question has substitution and cancelling involved, would be great if somebody can get the derived working out as I spent around 15-20 minutes on the question.
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Last edited by Drongoski; 19 Jun 2016 at 11:04 PM.
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If I am a conic section, then my e = ∞
Just so we don't have this discussion in the future, my definition of the natural numbers includes 0.
You did everything right except for that last line
1+r^-1+r^-2+r^-3=65/27
It's been a long day, and you had to do the division, which correctly pointed out. This is the kind of question they put to a Year 11, I think after today I will just stick to the Haeese textbooks (which are considerably easier).
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From there you have to use Trial and Error to solve for r or a graphics calculating facility (where they have Equation Solver )
Last edited by davidgoes4wce; 19 Jun 2016 at 10:58 PM.
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This is a Band 6 Question in IB maths..........................In IB they have 7 bands
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What do you reckon is harder, NSW maths or IB maths?
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im just curious lol
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My legal teacher full roasts us on how dumb we are and how much 'better' the IB kids are and whatnot...
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The IB is a more rigorous and demanding programme than the NSW HSC.
You can't just pick a group of any subjects that you fancy from a menu of 100 items. If you choose the IB Maths (HL), and opted for the "Calculus" [previously called the 'Series & Differential Equations'], as most schools here do, you have to do: Sequences & Series [and their convergence/divergence, Squeeze Thm, L'Hopital's, etc ], Improper Integrals, Power Series, Maclaurin & Taylor series, Error Term, Radius and Interval of Covergence etc, Differential Equations etc.
The core course includes: vectors, dot and cross product, and Equations (vector, parametric, Cartesian) of a line, a plane , their intersection, solution sets to a set of linear equations in x, y, z.
Last edited by Drongoski; 20 Jun 2016 at 12:28 AM.
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I think I'll be honest, if you read the Haeese Maths textbooks (which are published in Adelaide), you would say the NSW curriculum is harder.
Let's not kid ourselves, doing an international recognised curriculum you would generally expect the standards to be alot higher.
IB Maths November 2014
Maths Studies Candidates 2455
Maths SL Candidates 4093
Maths HL candidates 1333
IB Maths May 2014
Maths Studies 29,235
Maths SL 38,926
Maths HL 11,484
From what I gather there are two testing seasons one in May and one in November. From what I gather , is that the students in Australia prepare for the November exam. Whereas the Northern Hemisphere counterparts have to prepare for the May.
Australia has the largest intake participation in November according to the IB website with 1916/11125=17.22% candidates participating.
United States of America has the largest intake participation in May according to the IB Website with 73,028/137,330=53.17% candidates participating.
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