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    Vector q

    None of the 4. A vector in the opposite direction to 2i-4j+4k (magnitude 6) must be m(-2i+4j-4k) with m>0. Square root of 736 is not even a rational number, let alone an integer.
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    Calculus inequality proof

    Instead of using 'w' for interval width, maybe I should have used: $ $\delta x_i = x_i - x_{i-1}
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    KEEP FORGETTING MATH CONCEPTS

    Thank you. From my experience, the approach is to keep practising: this is how you remember. You don't remember by "memorising". Maths is a discipline that is based on deduction, i.e. logical reasoning. Basics like algebra is fundamental; if you are weak in your algebra, then the rest of your...
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    KEEP FORGETTING MATH CONCEPTS

    When you provide so little info re your problem, how would you expect to receive meaningful advice? What maths are you doing? What concepts you keep forgetting? How have you been faring in your maths so far? etc etc
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    Critical Response practise

    There are many American usage that has now infected Australia: - absent: "absent the strict enforcement . . . " vs "without the strict enforcement . . ." - snuck: "bad American usage has slowly snuck in . . . " vs "bad American usage has slowly sneaked in . . ." - maturation: this American...
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    Critical Response practise

    "practice" In English usage, the verb is "practise" and the noun is "practice". The Yanks use "practice" for both the verb and the noun.
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    PENS!

    You are right. In today's world handwriting is no longer relevant, except for the few occasions like sitting the HSC. But the post was not about handwriting per se, but about a better pen.
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    PENS!

    A smooth-writing instrument is of course better than one that struggles to glide. Knowing your stuff? You mean if you know your stuff, your thoughts can flow more smoothly into written words? Of course!
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    PENS!

    Nothing wrong with Muji 0.5. If your handwriting is not smooth or fast, it's very likely you have (like over 70% of your generation) not learnt how to write properly. Ask your grandparents or someone their age; they should know how to write and be able to show you how. But it won't be easy to...
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    Order of calculus topics

    combinatorics would not normally be part of the Calculus you learn in high school. The concept of limits can be quite abstract. You can understand it intuitively, like 3 -1/n approaches 3 as n approaches infinity. The more advanced epsilon-delta treatment is usually not done in the NSW HSC...
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    School Not Letting Certain Students Into Advanced.

    Students in Yr 7 & 8 should make sure to put in the necessary efforts to get into 5.3 stream later. If you end up in 5.2 or 5.1, there must be a reason. If you are assigned the 5.2 stream, maybe you should put in extra efforts to justify an upgrade into 5.3. I imagine 5.2 teachers will try to...
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    Kurt Mathematics Centre Experiences

    Parents send their children to Kurt for corporal punishment or is it for the challenging maths?
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    Kurt Mathematics Centre Experiences

    Ya, a metal ruler may be more painful than a wooden one. But nothing like the rotan. In 1994, a young American vandal (Michael P Fay) in Singapore was subject to 6 strokes of the rotan (professionally administered rotan); you don't want to be on the receiving end.
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    Kurt Mathematics Centre Experiences

    Ruler is for wimps. We want real canes made from rattan(hence in Malay, we refer to the cane as rotan)
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    Kurt Mathematics Centre Experiences

    What's wrong with the world today. We used to dispense the cane with gay abandon. Didn't leave any long-term detriment to the kids. If anything they became grateful mature and responsible adults. Ha ha.
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    Kurt Mathematics Centre Experiences

    Bring back the good ole fashioned way; canes and all. I'm all for it. Proven effective. I'm a proud product of this system.
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    Kurt

    Can you please forward me a copy. I'm really curious. Thanks
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    Writing in x + iy

    If imaginary part = 0, then number is real (a real number is still a complex number), so you should be OK. 7 = 7 + 0i (but we don't usually write it like this)
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