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Diketahui matriks A = (5 1 0 2), B = (x 4 3 1), C = (-1 -6

Pertanyaan

Diketahui matriks A = [[5, 1], [0, 2]], B = [[x, 4], [3, 1]], C = [[-1, -6], [y, 4]], dan D = [[19, 27], [4, -2]]. Jika AB-C=D, tentukan nilai x+y.

Solusi

Verified

Nilai x+y adalah 5.

Pembahasan

Diberikan matriks A = [[5, 1], [0, 2]], B = [[x, 4], [3, 1]], C = [[-1, -6], [y, 4]], dan D = [[19, 27], [4, -2]]. Kita perlu mencari nilai x dan y dari persamaan AB - C = D. Pertama, hitung AB: AB = [[5*x + 1*3, 5*4 + 1*1], [0*x + 2*3, 0*4 + 2*1]] AB = [[5x + 3, 21], [6, 2]] Selanjutnya, hitung AB - C: AB - C = [[(5x + 3) - (-1), 21 - (-6)], [6 - y, 2 - 4]] AB - C = [[5x + 4, 27], [6 - y, -2]] Sekarang, samakan dengan matriks D: [[5x + 4, 27], [6 - y, -2]] = [[19, 27], [4, -2]] Dari kesamaan elemen matriks: 1. 5x + 4 = 19 => 5x = 15 => x = 3 2. 6 - y = 4 => y = 6 - 4 => y = 2 Kita perlu mencari nilai x + y. x + y = 3 + 2 = 5.
Topik: Matriks
Section: Operasi Matriks

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