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  1. #1

    Jul 2011
    712

    /

    ( r ) /
    r = ( t + t ) i+ ( 3t 2 ) j + ( 2t - 4t ) k ( m )

    / .
    / ( s ) t = 2 .

    _________

    /

    ( 600 ) (15 ) .

    __________

    /

    ( 4 /˲ ) ( 4 ) ( 10 ) ( 8 /˲ ) .

    ___________

    /

    ( 60 ) ( 2 ) ( 15 / ) .

    /
    /
    ______
    /
    ( A ) = 2 = 60 . ( B A )
    ( A B ) .

    _____

    /
    :
    B A ) . C )
    A = i + 2 J + 3 K
    B = i + 2 J 3 K
    C = 2 i + 3 J + 4 K
    * .


  2. #2

    Jul 2011
    712

    :

    1


    2 t

    2
    =\

    3
    ( 4 /² ) ( 4 )
    1=1 + 1/2 ^2 = 8

    ( 10 )
    2=1+ =16\
    2=2 = 160

    ( 8 /² )
    2^2 = 1^2 + 2 3
    3=16

    = 1+2+3 = 184


    4
    2=1+ ........... 1=2-
    = 1 + 1/2 ^2 ( 1 )

    = ( 2 - ) + 1/2 ^2
    1


    5
    B


    6
    B ×A
    C


  3. #3
      Eiman
    Jul 2011
    -
    14,750

    :


    .......

  4. #4

    Jul 2011
    -
    15,678

    :




  5. #5

    Jul 2012
    5,302

    :





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