Results 1 to 9 of 9
  1. #1
    Expert at leaving women disappointed physically and emotionally.
    Premium Member
    Minionforce
    Wyo's Avatar
    Join Date
    Feb 2010
    Gender
    male
    Location
    Tijuana
    Posts
    21,785
    Reputation
    3161
    Thanks
    3,147
    My Mood
    Lurking

    Thumbs up Genius come at me.

    Can you explain me how to do this please?

    a + (a+d)+(a+2d)+...+[a+(n-1)d] = (n/2)[2a+(n-1)d]
     
    I smoke dix daily.
    I am Dix, and Arun is my master.
    I'M #1 NIGXMAS SCAMMER

  2. #2
    Saboteur's Avatar
    Join Date
    Mar 2010
    Gender
    male
    Location
    Great White North
    Posts
    29,418
    Reputation
    5235
    Thanks
    7,586
    My Mood
    Grumpy
    uhm..

    carry the 2, minus the ....


    OK. THE ANSWER IS 42.



    VIP Support // May 2011
    CF Minion // January 2012
    Newsforce // August 2012
    Minion+ // March 2013
    Moderator // August 2014
    Former Staff // January 2015
    General Minion // July 2015
    Publicist // December 2015


  3. The Following User Says Thank You to Saboteur For This Useful Post:

    [MPGH]Lehsyrus (11-19-2011)

  4. #3
    Threadstarter
    Expert at leaving women disappointed physically and emotionally.
    Premium Member
    Minionforce
    Wyo's Avatar
    Join Date
    Feb 2010
    Gender
    male
    Location
    Tijuana
    Posts
    21,785
    Reputation
    3161
    Thanks
    3,147
    My Mood
    Lurking
    Real answers Please @Austin
     
    I smoke dix daily.
    I am Dix, and Arun is my master.
    I'M #1 NIGXMAS SCAMMER

  5. #4

  6. #5
    4chan's Avatar
    Join Date
    Aug 2010
    Gender
    male
    Location
    Führerbunker
    Posts
    1,825
    Reputation
    146
    Thanks
    150
    My Mood
    Amused
    Alen I did this way.








    k be ANY value of n
    Pk is then proposition that :-
    a + ( a + d ) + --------[ a + ( k - 1) d ] = (k/2) [ 2a + (k - 1) d ]

    Have now to show that this is true for k = 1 and k = k + 1

    Consider k = 1
    ---------------------
    LHS = a
    RHS = (1/2) (2a) = a
    Thus true for k = 1

    Consider k = k + 1
    ----------------------------
    a + ( a + d ) + --------[ a + ( k) d ] = (k+1)/2) [ 2a + (k) d ]
    Have now to show this to be true:-

    Now
    a + ( a + d ) + ---[a + (k - 1)d] = (k/2) [2a + (k - 1) d ]___IS true
    a+(a + d)+ ---[a + (k)d] = (k/2) [ 2a + (k - 1) d ] + [a + kd]

    Consider RHS :-
    (k/2) [ 2a + (k - 1) d ] + [a + kd]
    ka + k(k-1)d/2 + a + kd
    (k + 1)a + kd [ (k - 1)/2 + 1 ]
    (k + 1)a + kd [ (k + 1)/2 ]
    [ (k + 1)/2 ] [ 2a + kd ]
    Thus P (k + 1) is true

    We now have:-
    Pk true
    P1 true
    P k + 1 true
    Thus true for all k
    Thus Pn is true
    @Alen

  7. #6
    Alen's Avatar
    Join Date
    Oct 2007
    Gender
    male
    Location
    Liquid Generator
    Posts
    27,930
    Reputation
    2539
    Thanks
    4,216
    My Mood
    Fine
    That's called mathematical induction and yeah, that's how one would go to prove such stuff.

  8. #7
    4chan's Avatar
    Join Date
    Aug 2010
    Gender
    male
    Location
    Führerbunker
    Posts
    1,825
    Reputation
    146
    Thanks
    150
    My Mood
    Amused
    Yeah, fuck University they send alot of homeworks.

  9. #8
    Alen's Avatar
    Join Date
    Oct 2007
    Gender
    male
    Location
    Liquid Generator
    Posts
    27,930
    Reputation
    2539
    Thanks
    4,216
    My Mood
    Fine
    Quote Originally Posted by -ECsTaSY- View Post
    Yeah, fuck University they send alot of homeworks.
    I sincerely doubt that's university grade, mathematical induction is usually somewhere around grade 10-12 or something?

  10. #9
    4chan's Avatar
    Join Date
    Aug 2010
    Gender
    male
    Location
    Führerbunker
    Posts
    1,825
    Reputation
    146
    Thanks
    150
    My Mood
    Amused
    Not in Spain I wanna be an architect

Similar Threads

  1. What r we gonna do when Punkbuster comes out
    By whatthe in forum WarRock - International Hacks
    Replies: 25
    Last Post: 07-09-2006, 11:09 PM
  2. Proof that Dr.Seuss is a genius
    By Jackal in forum Entertainment
    Replies: 14
    Last Post: 06-24-2006, 05:07 AM
  3. Hey all of you come in 2 see my new sib By:Jackal
    By 1h1a1i in forum Art & Graphic Design
    Replies: 5
    Last Post: 06-13-2006, 01:20 AM
  4. fast! Dave come here
    By Big Black in forum WarRock - International Hacks
    Replies: 4
    Last Post: 12-31-2005, 04:03 AM