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  1. J

    HSC 2013 MX2 Marathon (archive)

    Re: HSC 2013 4U Marathon 3ln2-2 is small. One would think the prob is higher.
  2. J

    HSC 2013 MX2 Marathon (archive)

    Re: HSC 2013 4U Marathon 0
  3. J

    Quadratic Inequality

    (-7-sqrt(45))/2 < a < -4+2sqrt(3)
  4. J

    Interest question: How can i find the mass of an object in a gravitational field?

    Mo*g = G*(Me * Mo)/(re^2 * Ax) Not possible, g is not constant.
  5. J

    Approximations of square roots

    It works due to local linearity of root functions at large x.
  7. J

    Complex number

    b=-a
  8. J

    Complex number

    d
  9. J

    Section II

    Could anyone please show the actual drawing of the solid (cube) and vanishing points V1, V2 in Q28 Writing Booklet. Thanks
  10. J

    question

    3(6c4)(2c1)(1c1)+3!(6c3)(3c2)(1c1)+1(6c2)(4c2)(2c2)=540
  11. J

    Complex Numbers

    Find where 1+z and 1+z'(conjugate) are on the Argand diagram.
  13. J

    Complex Numbers

    Or by geometry
  14. J

    question

    is the correct answer one of the 2?
  15. J

    question

    other answers?
  16. J

    SOLUTIONS - Terry Lee

    But it was clearly stated that 4n+1 is not a perfect square.
  17. J

    defeinite Integral

    \displaystyle \int_{0}^{50}f(x)dx =125
  19. J

    mechanics q

    http://www.itute.com/wp-content/uploads/rn_kinematics_mechanics.pdf p8, 9
  20. J

    Mechanics question

    Consider the supposed answer is wrong
  21. J

    Interesting theory

    In your example you have provided extra specifications other than equal angles.
  22. J

    Interesting theory

    No, e.g. a parallelogram and a rhombus with same 'corresponding' angles
  23. J

    Mechanics Question

    3, 4, 5 form a right angle triangle. T1, T2 and 10x9.8 form a similar right angle triangle. T1 = 6x9.8, T2 = 8x9.8. T2 is the tension in the short string.
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