Matematika

Pertanyaan

selesaian dari sistem persamaan 2/x - 2/y = -3 dan 2/x + 6/y = 1 adalah ....

2 Jawaban

  • Mapel : Matematika
    Bab : SPLDV

    2/x - 2/y = -3
    2/x + 6/y = 1
    ------------------ -
            -8/y = -4
                 y = -8/-4
                 y = 2

    2/x - 2/y = -3
    2/x - 2/2 = -3
       2/x - 1 = -3
             2x = -3 + 1
             2x = -2
               x = 2/-2
               x = -1

    HP = { -1, 2 } 
  • 2/x -2/y = -3
    2/x +6/y = 1
    _______________ _
    -8/y = -4
    y = -8/-4
    y = 2

    2/x -2/y = -3 |x3|
    2/x +6/y = 1 |x1|

    6/x -6/y = -9
    2/x +6y = 1
    ________________+
    8/x = -8
    x = 8/-8
    x = -1

    hp = {-1,2}

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