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  1. Affinity

    Integration by Special Properties

    sin(x) = sin(2x)/[2cos(x)] substitute and work on from there. remember your log rules, and sketching some graphs might help you realise somethings, good luck
  2. Affinity

    Harder Polynomial

    Do they teach it in some other state?
  3. Affinity

    where are you upto in the course

    newbie: think "I will finish the paper" instead of "q8 is too hard for me" To overcome this fear, get about 32 question 8s, divide them into four sets, and do one set every weekend :D .
  4. Affinity

    Harder Polynomial

    Thanx spice girl. that was short~ damn, overlooked the property that p| a_n and q| a_0 and took a long way :( And thanks to OLDMAN too :)
  5. Affinity

    Harder Polynomial

    underthesun: all coefficients are whole numbers. like x^3 + 1023x^2 -4x + (-2)
  7. Affinity

    Talented students day at usyd

    check the maths association (MANSW) website
  8. Affinity

    Harder Polynomial

    spice girl: Does modulo arithmetic make it easier? tried that, didn't come out nicely.
  9. Affinity

    where are you upto in the course

    Try reading ahead by yourself if you feel you are lagging behind.
  10. Affinity

    strange volumes Q

    no.. it isn't exact for anything above 3. there goes your induction exercise lazarus :P
  11. Affinity

    Integration by Special Properties

    under the sun: hmm challenge your teacher I{a --> b} f(x) dx = - I{b --> a} f(x) dx is right by definition of the definite integral
  13. Affinity

    Iron Core

    I find it rather difficult to bend those 1.25 mm wires
  14. Affinity

    Integration by Special Properties

    Interesting as well. Is there another method besides using the substitution given?
  15. Affinity

    where are you upto in the course

    we just done volumes, with mechanics and harder 3U left
  16. Affinity

    Harder Polynomial

    nice question :)
  17. Affinity

    Iron Core

    as a rule of thumb the one with more current -> thicker so the coil with less turns. Primary if you are steping up, Secondary if you are lowering the voltage.
  19. Affinity

    Differential equations

    Thanks everyone
  20. Affinity

    Mechanics

    thanks very much OLDMAN :), I will do some more practice questions
  21. Affinity

    Iron Core

    Just use the transformers/powerpacks at school :P
  22. Affinity

    Mechanics

    What about the equations for projectile motion?
  23. Affinity

    strange volumes Q

    Wogboy's model give 16Pi/3 in his model: z= 4 - 16y^2/(4-x^2) do the same integrations.
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