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  1. J

    Sequences and series questions

    Thanks man. Can anyone help me with this: a) Point M divides the interval AB internally in the ratio 1:x in such a way that AM is the geometric mean of BM and BA, find x and draw a diagram. b) Point M divides the interval externally in the ratio 1:x in such a way that AB is the geometric mean...
  2. J

    Sequences and series questions

    This is a two part question: a) Point M divides the interval AB internally in the ratio 1:x in such a way that AM is the geometric mean of BM and BA, find x and draw a diagram. b) Point M divides the interval externally in the ratio 1:x in such a way that AB is the geometric mean of AM and BM...
  3. J

    Some more coordinate geometry questions

    Thanks guys for the help and yes, I wrote the question wrong, sorry. Can anyone do 28 b) and c)?
  4. J

    Some more coordinate geometry questions

    Does anyone else have answers for 25, and 28 b) and c)? I also have this question: Show that every circle that passes through the intersections of the circle x^2 + y^2 = 2 and y=x can be written in the form (x-u)^2+ (y+u)^2 =2(1+u)^2
  5. J

    Some more coordinate geometry questions

    25. The line passing through M(a,b) intersects the x-axis at A and the y-axis at B. Find the equation of the line if: (a) M bisects AB, (b) M divides AB in the ratio 2 : 1, (c) M divides AB in the ratio k:l 26. The tangent to a circle is perpendicular to the radius at the point of contact. Use...
  6. J

    Permutations question

    That's what I got but as I said the answer was (4x3!)4! which is 576.
  7. J

    Permutations question

    Hi this is the question: Find the number of ways in which the letters of the word EPSILON can be arranged in a row so that the three vowels are all next to each other. I let the three vowels be V, and the four constants be C VCCCC You can arrange the whole thing 5! ways, then the vowels 3...
  8. J

    Help with a coordinate geometry question.

    Here is the question: Find the equations of the four circles which are tangent to the x-axis, the y-axis, and the line x + y = 2. I don't really know where to start. Thanks!
  9. J

    Hard trig question

    Thanks a lot, i knew the second was the same but could find a way to factorise them. :)
  10. J

    Hard trig question

    If this will help here's the picture of the question
  11. J

    Hard trig question

    Yep that's the question, if it's any help the answers are 45, 180 and 225 degrees for the first one and 120, 240, 19°28' and 160°32' for the second one.
  12. J

    Hard trig question

    The question is cosxtanx+tanx=cosx+1, I don't know what to do. Thanks. Also 6sinxcosx+3sinx=2cosx+1, it's the same type of question.
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