Recent content by juanitotruan77

  1. J

    How Can I Solve Part B of This Series Problem?

    That might be it, budd. Thanks. But i'd like to hear more suggestions, just in case.
  2. J

    How Can I Solve Part B of This Series Problem?

    Homework Statement Well I am stuck with this math problem and i was wondering if you could help me...
  3. J

    MATLAB How to do a dynamic graph in matlab

    Nevermind, i got it. What i really wanted was a changing sin plot. I'm going to leave it here in case anyone needs it. f = @(x,t) 1.5*sin(10*x-5*(t/10)); linkdata on hold on; for t=1:50 xi = -3*pi:pi/1000:pi; plot(f(xi,t)); pause(.1); clf('reset') end
  4. J

    MATLAB How to do a dynamic graph in matlab

    Hi guys, so I've never used MATLAB before, and i need to make a plot that changes constantly. Let's say that i have Sin(x) from 0 to 3pi Then i need it to change to a Cos(x) from 0 to 3pi then to a Tan(x). I could do it in other languaje like Php or c, but in MATLAB i have no idea. I...
  5. J

    Help me to verify some Probability answers

    Oh i wrote the #3 wroing, It's -.5x^3 not .333x^3. #4 that's exactly what i did, sorry for the lack of explanation. #1 is because you can't repeat words, so you have 4*4*3*3 and you have 6 posible orders: v v c c v c v c v c c v c v v c c v c v c c v v or 6!. Or you can apply the...
  6. J

    Help me to verify some Probability answers

    Homework Statement So i have this 4 problems that i already answered, but i want to know if I am right. 1.- how many 4 letter words can be made with the letters of the word "emulsion" if you can use 2 vocals and 2 consonants. My answer: 864 4*4*3*3*3! 2._ how many triangles can you make...
  7. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    Thanks to you too! Physics, my physic's teacher is a very good teacher.
  8. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    yeah, I've learn more probability here in 5 days than in 6 months of school, thanks!
  9. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    Ohhh i made a mistake in the code, i didn't think that the random number generator could generate more than 1 pair of the same kind of socks. You're both right, and THANKS A LOT FOR ALL YOUR HELP, especially to haruspex for having me so much patience.
  10. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    The thing is that my physics teacher told me that the answer has to be near 28, that's why I'm so frustrated. I think it has something to do with the fact that you might be considering that the array of posibilities is a binary tree but you can't have a pair in your next move without another not...
  11. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    Well, i did the Q(r,t) = Q(r,t+1) and it gave me t=12.50842616853577. I attached my Mathematica notebook with the procedure, but i can't find with I'm doing wrong.
  12. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    So i equal them and replace the values in the full formula with all the factorials? You said at the beggining that you got 27 by doing this, how? i tried and it didn't reduced to a cuadratic t term.
  13. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    I didn't understand that, can you explain it, please?
  14. J

    Probability of Getting 10 Pairs from a Box of 30 Socks

    I was checking my code and i noticed that i was doing something wrong. When i corrected it, it gave me the following: 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 20 7.1674927250735E-9 21 1.5051734722654E-7 22 1.6132372087358E-6...
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