Matematika

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tolong bantu jawab beserta caranya
tolong bantu jawab beserta caranya

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1 Jawaban

  • Fungsi

    18||

    f (x) = ax + b
    f (3) ⇒ 3a + b = 11
    f (1) ⇒   a + b = 7
                -------------- -
                       2a = 4
                         a = 2

    ⇔    3a + b = 11
    ⇔ 3 (2) + b = 11
    ⇔      6  + b = 11
    ⇔             b = 5

    maka, rumus fungsi

    f (x) = ax + b
    f (x) = 2x + 5 (A)


    19||

    persamaan y = -2x + 4

    misal, y = 0

    y   = -2x + 4       HP = {x, y}
    0   = -2x + 4       HP = {2, 0}
    2x = 4               
      x = 2


    misal, x = 0

    y = -2x + 4             HP = {x, y}
    y = -2 (0) + 4          HP = {0, 4}
    y = 0 + 4
    y = 4

    HP = {2, 0} atau {0, 4}  C


    Semoga Membantu!!!
     

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