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Pertanyaan

Perhatikan matriks-matriks berikut. P = ( − 9 2 ​ 0 3 ​ ) , Q = ( 2 0 ​ 5 6 ​ ) , dan R = ( − 8 3 ​ 1 2 ​ ) . Tentukan: b. determinan matriks T jika T = RP + 2 Q .

Perhatikan matriks-matriks berikut.

, , dan . Tentukan:

b.    determinan matriks jika .

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F. Nur

Master Teacher

Mahasiswa/Alumni Universitas Muhammadiyah Malang

Jawaban terverifikasi

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 begin mathsize 14px style det open parentheses T close parentheses equals 1703 end style

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Jadi, .

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row T equals cell R P plus 2 Q end cell row blank equals cell open parentheses table row cell negative 8 end cell 1 row 3 2 end table close parentheses open parentheses table row cell negative 9 end cell 0 row 2 3 end table close parentheses plus 2 open parentheses table row 2 5 row 0 6 end table close parentheses end cell row blank equals cell open parentheses table row cell negative 8 cross times negative 9 plus 1 cross times 2 end cell cell negative 8 cross times 0 plus 1 cross times 3 end cell row cell 3 cross times negative 9 plus 2 cross times 2 end cell cell 3 cross times 0 plus 2 cross times 3 end cell end table close parentheses plus open parentheses table row 4 10 row 0 12 end table close parentheses end cell row blank equals cell open parentheses table row 74 3 row cell negative 23 end cell 6 end table close parentheses plus open parentheses table row 4 10 row 0 12 end table close parentheses end cell row blank equals cell open parentheses table row 78 13 row cell negative 23 end cell 18 end table close parentheses end cell end table end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell det left parenthesis T right parenthesis end cell equals cell open vertical bar table row 78 13 row cell negative 23 end cell 18 end table close vertical bar end cell row blank equals cell 78 cross times 18 minus 13 cross times open parentheses negative 23 close parentheses end cell row blank equals 1703 end table end style

Jadi, begin mathsize 14px style det open parentheses T close parentheses equals 1703 end style

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Diketahui matriks A = ( 3 − 1 ​ 2 4 ​ ) , B = ( − 3 0 ​ 2 5 ​ ) , dan C = ( 2 0 ​ 1 4 ​ ) . Tentukan hasil matriks 2 ⋅ A ⋅ B + C !

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