Diketahui matriks A ber ordo 3×3 seperti di gambar. Tentukan invers matriks A

<p>dari bentuk matrik A = | 1 &nbsp; 2 &nbsp; 0 |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;| -1 &nbsp;1 &nbsp; 2 |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;| 2 &nbsp; 1 &nbsp; 0 |</p><p>diperoleh |A| = (0+8+0) - (0+2+0)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 8 - 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|A| = 6</p><p>adj A = | -2 &nbsp; -4 &nbsp; -3 |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;| 0 &nbsp; &nbsp; 0 &nbsp; -3 |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;| 4 &nbsp; &nbsp; 2 &nbsp; &nbsp;3 |</p><p>&nbsp;</p><p>A^-1 = 1/6 &nbsp;| -2 &nbsp; -4 &nbsp; -3 |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;| 0 &nbsp; &nbsp; 0 &nbsp; -3 |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;| 4 &nbsp; &nbsp; 2 &nbsp; &nbsp;3 |</p><p>A^-1 = &nbsp;| -1/3 &nbsp; -2/3 &nbsp; &nbsp;-½ |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; | 0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0 &nbsp; &nbsp; &nbsp; -½ |</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; | 2/3 &nbsp; &nbsp;1/3 &nbsp; &nbsp; &nbsp;½ |</p><p>&nbsp;</p><p>pada pilihan tidak ada</p><p>semoga membantu.</p>