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  1. A

    integration

    yea that's right. but when i integrated and substituted 1 and 0, i ended up with ln(-1) and ln(-2) as part of my answer. I took the absolute values inside the bracket and simplified, ending up with the correct answer. Can i do this?
  2. A

    integration

    find the definite integral of (7+x-2x^2)/(2-x) from 1 to 0.
  3. A

    Year 11 - should i drop to general

    Do whatever subjects that you feel comfortable with, but also gets you into Psychology. You can do a bridging course in uni to cover 2U.
  4. A

    integration

    thank you :)
  5. A

    integration

    find the integral of (secx)^3*tanx dx.
  7. A

    Yeah, pretty much everyone uses his acc (Alicia btw lol). I didn't type that first message though

    Yeah, pretty much everyone uses his acc (Alicia btw lol). I didn't type that first message though
  8. A

    LOL Everyones using it. Kumez ex-PM class all have access. >=D

    LOL Everyones using it. Kumez ex-PM class all have access. >=D
  9. A

    How to get band 5 without a tutor!

    LOLOL Thong <_<"
  10. A

    Structuring ideas and essay for Frankenstein/BR

    Is there a more sophisticated, or a more marker-favoured structuring of the essay?
  11. A

    Tangents to circles

    My teacher said it was a James Ruse question. lol
  13. A

    Tangents to circles

    umm.. can you explain how you got that?
  14. A

    Tangents to circles

    The line 4x + 3y - 60 = 0 and both co-ordinate axes are tangents to a circle. Find the radius of the circle.
  15. A

    Roots of unity

    can this be solved using roots of unity?
  16. A

    Roots of unity

    Find the solution to the following equation. Express answer in a + bi form. x^2 + (3 - i)x - 3i = 0
  17. A

    Roots of Unity?

    Can someone explain how to do this question? :) 1, w and w^2 are the three cube roots of unity. State the values of w^3 and 1 + w + w^2. Hence simplify each of the expressions (1 + 3w + w^2)^2 and (1 + w + 3w^2)^2 and show that their sum is -4 and their product is 16. (also, why do we...
  19. A

    How is growth of technology linked to investment?

    :)
  20. A

    Complex Numbers Question - Patel

    Can someone show me how to do these? If z1 = 1 + sqrt3*i and z2 = sqrt3 + i, find: a) z1 + z2 in mod-arg form b) z1 - z2 in mod-arg form c) (z1 + z2)/(z1 - z2) in the form A + iB d) [(z1 + z2)/(z1 - z2)]^2 in the form A + iB Answers: a) sqrt2*(1+sqrt3)cis(pi/4) b)...
  21. A

    Proving De Moivre's

    How do i prove that [r(cosx + isinx)]^3 = r^3 * (cos3x + isin3x)?
  22. A

    Integration

    the answer i get is approx 4.67. But the answer at the back of the book says 2.66. Can some please evaluate the integral so i can see whether the answer is right or wrong? :)
  23. A

    Integration

    given that 1/(x-2) - 4/(x+3) + 3 = (3x^2 - 7)/ ((x-2)(x+3)), find the area between the curve and the x-axis between their points of intersection.
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