1. Welcome Back! Please clear your cookies and cache. If you encounter issues please report it on this thread here --> https://www.capitalcichlids.org/forums/posts/245545/ Thanks
    Dismiss Notice
  2. Next meeting of the CCA - September 10th 2pm John Krepper / Enjoying Lake Tanganyika Cichlids and their aquarium requirements.
    Dismiss Notice

Pre college algebra

Discussion in 'Just Kickin' It Lounge' started by fishman13, Sep 21, 2012.

  1. fishman13

    fishman13 Members

    Real Name:
    Cameron Bradley
    Joined:
    Oct 23, 2011
    Messages:
    646
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Parkville MD
    Last Activity:
    Jul 4, 2015
    Who knows how to write out and use recursive equations. Thbats the uniot we are in right now and I dont understand. Ex. 10,5,0,-1
    Wright a recursion formula for this system of numbers?
     
  2. D-money

    D-money Members

    Real Name:
    Joined:
    Apr 13, 2009
    Messages:
    225
    Likes Received:
    0
    Trophy Points:
    16
    Last Activity:
    Jul 22, 2016
  3. Leffler817

    Leffler817 Global Moderators
    Staff Member

    Real Name:
    Shawn Leffler
    Joined:
    Feb 5, 2010
    Messages:
    2,840
    Likes Received:
    3
    Trophy Points:
    38
    Location:
    East New Market, MD
    Last Activity:
    Today at 11:25 AM
    Don't worry about it. You'll never use it again.


    Sent from my iPhone using MonsterAquariaNetwork app
     
  4. verbal

    verbal CCA Members

    Real Name:
    Jesse
    Joined:
    Jul 21, 2010
    Messages:
    3,580
    Likes Received:
    0
    Trophy Points:
    36
    Location:
    Herndon, VA
    Last Activity:
    Aug 9, 2016
    Or you will use it again and again and again lol
     
  5. FishInMaryland

    FishInMaryland Members

    Real Name:
    Ruth
    Joined:
    Apr 17, 2010
    Messages:
    375
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Davidsonville, MD
    Last Activity:
    Jun 23, 2015
    Is that really the sequence of numbers you were given, or should it be 10, 5, 0, -5?

    If those really were the right numbers, what did the answer turn out to be?
     
  6. fishman13

    fishman13 Members

    Real Name:
    Cameron Bradley
    Joined:
    Oct 23, 2011
    Messages:
    646
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Parkville MD
    Last Activity:
    Jul 4, 2015
    It was just an example. But yeah it should of been -5. Thanks guys
     
  7. FishInMaryland

    FishInMaryland Members

    Real Name:
    Ruth
    Joined:
    Apr 17, 2010
    Messages:
    375
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Davidsonville, MD
    Last Activity:
    Jun 23, 2015
    I'm a little late responding, but by now hopefully you learned that you have to figure out the pattern in the numbers, then come up with a formula for the next number in the sequence, based on the prior number. So, for this one, you subtract 5 from the previous number in the sequence. You know that "n" means the nth number in the sequence, so the (n-1)th number is the immediately preceding number?

    Formula for your example is Tn = T(n-1) -5

    The n and (n-1) above should be subscript, but I can't do that in this editor.
     
  8. turfboss

    turfboss Members

    Real Name:
    George Cowan
    Joined:
    Dec 13, 2011
    Messages:
    463
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Severna Park, MD
    Last Activity:
    Apr 26, 2016
    I can't figure out the answer for the nth term in the sequence given above - if the T(n) I am looking for is the 20th term in this sequence the formula given requires me to know what the 19th number in the sequence is before I can figure out the 20th term. In general, the nth term of an arithmetic sequence is given by the formula
    a(n) = a(1) + (n-1)d where n is the nth term you are looking for and a(1) is the first term in the sequence and d is the difference between the numbers in the given sequence. So for 10,5,0,-5 the first number in the sequence a(1) is 10, you are looking for the next number in the squence which in this case is the 5th number so (n-1) is 4 and the d = -5 so [10 - 4*(-5)] is 10 - 20 = -10. This formula works for geometric and arithmetic sequences but Cameron was asked to write a recursive formula for this sequence and this formulation is not a recursive formula. It will give you the nth term in a simple geometric progression but would not for example provide the answer he is looking for when the difference is not a simple integer.

    This is College Algebra (not arithmetic) and "recursive" formulations require calculating the smaller differences in numbers in a sequence and using the difference between them in such a manner as to build the summation series for enough of the first elements to be able to calculate future differences - a really good example (of how to calculate a Fibonacci Series) for those who are interested (and hopefully Cameron is) can be found at the following link - http://www.cs.uiuc.edu/~mfleck/building-blocks/version-1.0/recursive-definition.pdf
     
  9. cabinetmkr39

    cabinetmkr39 DavidG / CCA Member

    Real Name:
    David
    Joined:
    Jan 17, 2008
    Messages:
    927
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Abingdon Maryland
    Last Activity:
    Today at 7:30 AM
    PRICELESS from our school teacher.:D
     
  10. Leffler817

    Leffler817 Global Moderators
    Staff Member

    Real Name:
    Shawn Leffler
    Joined:
    Feb 5, 2010
    Messages:
    2,840
    Likes Received:
    3
    Trophy Points:
    38
    Location:
    East New Market, MD
    Last Activity:
    Today at 11:25 AM
    Hey! I like to keep it real! I don't remember the last time I needed Trigonometry or Calculus but I was forced to take it in school. :angry3:
     
  11. Beeman

    Beeman Members

    Real Name:
    Barry Gaertner
    Joined:
    Sep 10, 2011
    Messages:
    325
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Trappe, Md
    Last Activity:
    Sep 23, 2015
    WTF!!! If I have 12 donuts, and I eat one, I have 11 left! What more do I need to know?!?! I was a math/science major in high school and college. I have NEVER needed to use algebra or calculus EVER since! And I still have 11 donuts! What I have learned thru this long, but tenuous life we all lead, is that I have donuts to share with all sentient beings(although they're starting to 'firm up'!) Amen
     

Share This Page