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You'll have to explain your logic, including why it doesn't apply for other equations.

Re: MX2 2015 Integration Marathon Find the 6th roots of unity, delete 1 from the list, pair the complex roots to form quadratic factors, then use partial fractions. (or use partial fractions on the complex factors)

Why would you turn 18.02 into 19. It's not asking for an integer number of years .... the kind of question people are getting confused with would say something like "What is the minimum number of complete years for the population to double?". And if you did do this, why on earth would anyone...

Where did you get this question from? Not that it affects the maths required for the question, but I would have thought that the question writer would have tried to get the physics right. Assuming it has uniform density, the centre of gravity of a cone is 3/4 of the way from the apex to the...

That is not saying that marks don't matter.

The 1989 syllabus was not a new syllabus. As it says at the top of the 2nd page, it was only an amendment to the 1980 syllabus. There were no new topics and no topics were discarded. The only difference was that each topic was specified in a lot more detail. There was no hoo-hah regarding its...

I read the whole thing, and can't find any claim that marks do not matter. It says that relative gaps between assessment marks are what count.

Could you direct me to the part of their site that states BOTH that rank matters AND that marks do not matter.

Why do people keep believing this nonsense?

Re: HSC 2015 2U Marathon I'm not talking about concave up/down. I'm talking about (for example) the area of the region between y=x^2 and the Y-axis. (ie. y = sqrt(x) and the x-axis) That is, it gives the exact area on the convex side of the the parabola, but not on the concave side. Edit...

Re: HSC 2015 2U Marathon I'm not sure what content is in the current General course - I've never taught it. But Simpson's rule was in the old Maths in Society course (pre 2001). But it wasn't connected with the number plane. Instead it was about approximating the areas of fields and paddocks...

Re: HSC 2015 2U Marathon Are you sure you haven't already guessed what I mean?

It is just a number that depends on the object and the fluid it is travelling through. A javelin travelling through air would have a lower value of k than a car travelling through the same air. A javelin travelling through air would have a lower value of k than a javelin travelling through...

Re: HSC 2015 2U Marathon Yep .... silly statement. And I'll take this opportunity to correct a misunderstanding many people have: Many people learn that Simpson's rule gives the exact value for the area of a parabolic region. This is only true if the area is external to the parabola...

Re: HSC 2015 2U Marathon Just clarifying that: n is the number of sub-intervals if you are using the h/6 version of the rule. When using the h/3 version , n is the number of applications of the rule. [Or it can vary depending on whether you use h=(b-a)/n or h=(b-a)/2n ] And your numbers are...

Re: HSC 2015 2U Marathon Sorry for digging up a dead post, but I had to correct this statement. In general, Simpson's rule converges much more quickly to the exact answer than does the trapezoidal rule. The correct answer should be: when the function is linear

When schools assess that students aren't good enough to use Cambridge, they are usually correct for the majority of students. The fact is that large numbers of 2U students don't have the ability to understand this maths beyond the most basic level, and MIF is all they are capable of handling...

Re: MX2 2015 Integration Marathon

I'm wondering why you take such issue with a mere point of view. Surely there can be no outwardly visible negatives to someone having pluralistic religious beliefs .... people who think all religions are equal are hardly going to fly planes into buildings. Although I believe people are misguided...

Not true for n=2. True for n=3. If true for n unit, also true for (n+1) unit.