Results 1 to 4 of 4

Math Help - Prime number

  1. #1
    Super Member dhiab's Avatar
    Joined
    May 2009
    From
    ALGERIA
    Posts
    539

    Prime number

    1 ) Calculate :
    2 ) Deduct : the number 103121 is prime number.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor Amer's Avatar
    Joined
    May 2009
    From
    Jordan
    Posts
    1,093
    for the first one

    (x^3+2x+1)(x^2+1)

    x^2(x^3+2x+1)+1(x^3+2x+1)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member great_math's Avatar
    Joined
    Oct 2008
    Posts
    132
    103121=101\times 1021

    A answer without calculators will be highly appreciated..
    I used a calculator
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member pacman's Avatar
    Joined
    Jul 2009
    Posts
    448
    ; if x = 10, then (10^3 + 2(10) + 1)(10^2 + 1) = (1021)(101) = 103121
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: September 24th 2011, 12:23 PM
  2. Prime number 2
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: May 1st 2010, 05:03 AM
  3. Prime number
    Posted in the Number Theory Forum
    Replies: 4
    Last Post: May 1st 2010, 04:53 AM
  4. Replies: 1
    Last Post: September 2nd 2009, 09:31 AM
  5. Number theory, prime number
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: September 17th 2006, 09:11 PM

Search Tags


/mathhelpforum @mathhelpforum