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  1. onebytwo

    quick integration q

    can someone plz help integrate; 3 S 1/rt(x^2-1)dx rt2 ie from root 2 to 3 thanks for any help
  2. onebytwo

    integration of lnx

    if this helps if your asked to integrate a definite integral, then try and relate the lnx curve to the exponential curve. use the area of a rectangle minus the area to the left of the curve......if that makes sense
  3. onebytwo

    integration of lnx

    if this helps if your asked to integrate a definite integral, then try and relate the lnx curve to the exponential curve. use the area of a rectangle minus the area to the left of the curve......if that makes sense
  4. onebytwo

    tables/graphs in chemistry

    use crosses when plotting points on a graph try to use the entire graph space provided always draw a line or curve of best fit and ignore 'outlier points' always have a title, and label your axes with measurments. have a proportional spacing of the units on the axes
  5. onebytwo

    Log Question

    for (ii) dy/dx = 1/(x+1), so at A(e-1,1), m=1/e so using point gradient formula, y-1=(1/e)(x-e+1) so ey = x + 1
  6. onebytwo

    Log Question

    for part (i) just let y = 1 so 1 = ln (x+1), so e^1 = x +1, so x = e - 1
  7. onebytwo

    concis q

    i get that also, what if they asked to find the foci and directices or whatever??? how would you go about that
  8. onebytwo

    concis q

    hello people, just wanted to know for the equation 2xy - 3x - y - 2 = 0 - how would you rewrite it in hyperbolic form - how would show its a hyperbola thanks for any help
  9. onebytwo

    Hyperbolae

    well it usually depends on the question. if it is a purely graphical question asking to show features then, of course, you would
  10. onebytwo

    conics confusion

    nice one pluvia
  11. onebytwo

    strange?

    ok, but what if you consider the number before 0.9999999......... oh yeah, there is no number. but i still cant comes to terms with having one number equal to another thanks anyway
  12. onebytwo

    strange?

    i saw this paradox on some website: let x=0.99999........ so, 10x = 9.99999..... then, 9x = 9 so, x=1 therfore 1 = 0.99999...... how can one number equal another, if the above working is not flawed, which i dont think is. can anyone explain
  13. onebytwo

    Best Economics Textbook

    i think leading edge, as well as being extremely dry, can't offer "band 6" level thought. the updated economics, is ok in inspiring some further understanding, but i still dont think any of them compare to the riley in terms of depth of information
  14. onebytwo

    ?terry lee? - i dont get u

    i dont have the book either, i got a photocopy, teacher didnt give answers, so i dont know. ill still try both. thanks anyway
  15. onebytwo

    ?terry lee? - i dont get u

    can someone help me try and make sense of terry lee's questions in his 3 unit textbook, ex. 24.1 question 20, APCW2. it says " the height of a circular cone is increasing at 3cm/s, while th eradius of the base is decreasing at the rate of 2cm/s. Find the rate of change of the volume when the...
  16. onebytwo

    Geometry Question

    i think your way is the most logical. your friends method is also correct, but doesnt seem to illustrate proper reasoning
  17. onebytwo

    solubilty rules

    the info. is great, thanks a lot!!!!!!!
  18. onebytwo

    solubilty rules

    can anybody please tell me where i can find a simple table of the solubility rules we need to know? thanks heaps
  19. onebytwo

    Fe(II) re: flame test

    i know that iron(3) nitrate turns the flame yellow. its probably6 completely different to iron (2)
  20. onebytwo

    Trig Integration Help

    you put 1 on 1/3 out the front, that is, 3 because when you put 1/3 on top you have to balance it by putting 1/3 at the bottom, so u get the answer as written in the book. hope that helps
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