Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    14
    ReputationRep:
    P_0 is the no of cells in the petri dish on day 0
    p is the fraction of cells which survive and split into 2
    1-p is then the fraction of cells which die
    each cell contributes on average 2d+0x(1-d) cell to the next gen
    but why 0x? surely some cells would die rather than none?


    so then

    p_{n+1} =(2d+0\cdot (1-d))\cdot P_n
    • Study Helper
    Offline

    13
    (Original post by will'o'wisp2)
    P_0 is the no of cells in the petri dish on day 0
    p is the fraction of cells which survive and split into 2
    1-p is then the fraction of cells which die
    each cell contributes on average 2d+0x(1-d) cell to the next gen
    but why 0x? surely some cells would die rather than none?


    so then

    p_{n+1} =(2d+0\cdot (1-d))\cdot P_n

    You talk about p, but your equation has d's, and you talk about x, but there is none - trying to confuse us?

    It's not saying none die, only that they contribute nothing to the next day's count.

    The next day consists of twice the number that split, 2dP_n, and none of the ones that don't split (as they die), 0(1-d)P_n. The second term is really completely redundant.
    • Thread Starter
    Offline

    14
    ReputationRep:
    (Original post by ghostwalker)
    You talk about p, but your equation has d's, and you talk about x, but there is none - trying to confuse us?

    It's not saying none die, only that they contribute nothing to the next day's count.

    The next day consists of twice the number that split, 2dP_n, and none of the ones that don't split (as they die), 0(1-d)P_n. The second term is really completely redundant.
    ah whoops mistake the x is supposed to be a times >.> <.<

    Oh right i get it now... thanks man
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Did TEF Bronze Award affect your UCAS choices?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.