Matematika

Pertanyaan

titik a(3 2 -1) b(1 -2 1) c(7 p-1 -5) segaris untuk nilai p=

1 Jawaban

  • Syarat suatu garis kolinear
    AC = mAB
    AB = B - A = (1 -2 1)-(3 2 -1) = (-2 -4 2)
    AC = C - A = (7 p-1 -5)-(3 2 -1) = (4 p-3 -4)
    (4 p-3 -4) = m(-2 -4 2)
    (4 p-3 -4) = (-2m -4m 2m)
    4 = -2m
    m = -2
    p - 3 = -4m = -4(-2) = 8
    p = 8+3 = 11

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