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  1. J

    HSC 2014 MX2 Marathon ADVANCED (archive)

    Re: HSC 2014 4U Marathon - Advanced Level in this case when does minimum occur?
  2. J

    HSC 2014 MX2 Marathon ADVANCED (archive)

    Re: HSC 2014 4U Marathon - Advanced Level the inequality shows symmetry in a, b and c. nature does not favor one or the other. minimum value when a=b=c=3/4
  3. J

    HSC 2014 MX2 Marathon (archive)

    Re: HSC 2014 4U Marathon The equation shows symmetry in x and y. Interchanging x and y yields the same equation, the inverse is the same relation. Rotate the relation by 45 deg anticlockwise, the new relation will be symmetrical about the y-axis. Sketch the new relation 11x^2/2 -7y^2/2=1, a...
  4. J

    HSC 2014 MX2 Marathon ADVANCED (archive)

    Re: HSC 2014 4U Marathon - Advanced Level f(x)=c
  5. J

    HSC 2014 MX2 Marathon ADVANCED (archive)

    Re: HSC 2014 4U Marathon - Advanced Level f(x)=1/2 + linear combination of odd power of (x-1/2)
  6. J

    Roots of Polynomials Q

    The polynomial P(x/m) is the dilation of P(x) by a factor of m in the x-direction, .: all roots of P(x/m)=0 are m times those of P(x)=0.
  7. J

    Need urgent help with a complex locus problem!

    Midpoint of PQ is (5x+3yi)/8 Translate P to P': x+yi - (5x+3yi)/8 = (3x+5yi)/8 Rotate P' by 90 degree anticlockwise about O to get Q': i(3x+5yi)/8 = (-5y+3xi)/8 Translate Q' to Q: (-5y+3xi)/8 + (5x+3yi)/8 = [5(x-y)+3(x+y)]/8 Let X=5(x-y)/8 and Y=3(x+y)/8; 8X/5=x-y and 8Y/3=x+y...
  8. J

    motion question

    a= dv/dt = dx/dt dv/dx = v dv/dx = 1/2 dv^2/dv dv/dx = 1/2 dv^2/dx
  9. J

    HSC 2013 MX2 Marathon (archive)

    Re: HSC 2014 4U Marathon p(x)=1
  10. J

    HSC 2013 MX2 Marathon (archive)

    Re: HSC 2014 4U Marathon
  11. J

    HSC 2012-14 MX2 Integration Marathon (archive)

    Re: MX2 Integration Marathon
  12. J

    Nice probability question.

    'nice' means 'simple'?
  13. J

    Nice probability question.

    2^(n-1) ?
  14. J

    Significant figures?

    In reporting the results of scientific investigations, all measurements are in decimal form, e.g. 2.03 x 10^8 km indicating the number of significant figures. If a value is known to be exact, then it is considered to have infinitely many significant figures, e.g. 20 candles. In a question very...
  15. J

    Carrotsticks' MX2 HSC 2013 Solutions

    Can any one explain Q12diii?
  16. J

    integer ordered pairs in binomial coefficient

    (1) (10,3), (10,7), (120,1), (120,119)
  17. J

    Difference between normal force and reaction force?

    http://community.boredofstudies.org/showthread.php?t=310675&p=6408641#post6408641
  18. J

    Difference between normal force and reaction force?

    What is the relationship between them?
  19. J

    Complex numbers

    complete the square 4x^2 -4x + 5=4x^2 -4x + 1 + 4= (2x-1)^2 - (2i)^2 etc.
  20. J

    reaction

    the question asked for reaction, not normal reaction.
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