Misalkan Vektor Yang Tegak Lurus Tersebut Adalah U.docx

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Misalkan vektor yang tegak lurus tersebut adalah u = (x, y, z)

Vektor a dan u tegak lurus artinya (1)(x)+(2)(y)+(1)(z) = 0 x + 2y + z = 0

Vektor c dan u tegak lurus artinya (1)(x) + (3)(y) + (2)(z) = 0 x + 3y + 2z = 0

Diperoleh sistem persaman linear, x + 2y + z = 0 x + 3y + 2z = 0

Eliminasi kedua persamaan, x + 2y + z = 0 x + 3y + 2z = 0 ---------------------- -y - z = 0 -y = z y = -z

x = - 2y - z x = - 2(-z) - z x = 2z - z x=z

Solusi dari sistem persaman linear adalah solusi banyak dengan, z=t

y = -t x=t

Sehingga vektor u = (t, -t, t) Contoh 1, pilih t = 1 u = (1, -1, 1) Contoh 2, pilih t = 2 u = (2, -2, 2) Contoh 3, pilih t = 3 u = (3, -3, 3)

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