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Diketahui matriks K = ( k m ​ l n ​ ) , A = ( 2 0 ​ ) , B = ( 8 − 2 ​ ) , C = ( 1 1 ​ ) dan B = ( 6 2 ​ ) Jika KA = B, KC = D, nilai dari K = ( − 2 1 ​ ) adalah ....

Diketahui matriks dan Jika KA = B, KC = D, nilai dari adalah ....

  1. begin mathsize 14px style open parentheses table row cell negative 6 end cell row 5 end table close parentheses end style

  2. begin mathsize 14px style open parentheses table row 5 row cell negative 4 end cell end table close parentheses end style

  3. begin mathsize 14px style open parentheses table row 6 row cell negative 5 end cell end table close parentheses end style

  4. begin mathsize 14px style open parentheses table row 12 row cell negative 5 end cell end table close parentheses end style

  5. begin mathsize 14px style open parentheses table row cell negative 14 end cell row 7 end table close parentheses end style

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Y. Laksmi

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begin mathsize 14px style bold Catatan bold space bold colon bold thin space Pada space soal space tertulis space straight B equals open parentheses table row 6 row 2 end table close parentheses comma space yang space seharusnya  straight D equals open parentheses table row 6 row 2 end table close parentheses.    bold i bold right parenthesis space Operasikan space KA equals straight B  KA equals straight B  open parentheses table row straight k straight l row straight m straight n end table close parentheses open parentheses table row 2 row 0 end table close parentheses equals open parentheses table row 8 row cell negative 2 end cell end table close parentheses  open parentheses table row cell straight k.2 plus straight l.0 end cell row cell straight m.2 plus straight n.0 end cell end table close parentheses equals open parentheses table row 8 row cell negative 2 end cell end table close parentheses  open parentheses table row cell 2 straight k end cell row cell 2 straight m end cell end table close parentheses equals open parentheses table row 8 row cell negative 2 end cell end table close parentheses  Didapat  2 straight k equals 8 rightwards arrow straight k equals 4  2 straight m equals negative 2 rightwards arrow straight m equals negative 1    bold ii bold right parenthesis space Operasikan space KC equals straight D  KC equals straight D  open parentheses table row straight k straight l row straight m straight n end table close parentheses open parentheses table row 1 row 1 end table close parentheses equals open parentheses table row 6 row 2 end table close parentheses  open parentheses table row cell straight k.1 plus straight l.1 end cell row cell straight m.1 plus straight n.1 end cell end table close parentheses equals open parentheses table row 6 row 2 end table close parentheses  open parentheses table row cell straight k plus straight l end cell row cell straight m plus straight n end cell end table close parentheses equals open parentheses table row 6 row 2 end table close parentheses  Didapat  straight k plus straight l equals 6 rightwards arrow 4 plus straight l equals 6 rightwards arrow straight l equals 2  straight m plus straight n equals 2 rightwards arrow open parentheses negative 1 close parentheses plus straight n equals 2 rightwards arrow straight n equals 3    bold iii bold right parenthesis space Susun space matriks space straight K  straight K equals open parentheses table row straight k straight l row straight m straight n end table close parentheses equals open parentheses table row 4 2 row cell negative 1 end cell 3 end table close parentheses    bold iv bold right parenthesis space Operasikan space straight K open parentheses table row cell negative 2 end cell row 1 end table close parentheses  straight K open parentheses table row cell negative 2 end cell row 1 end table close parentheses equals open parentheses table row 4 2 row cell negative 1 end cell 3 end table close parentheses open parentheses table row cell negative 2 end cell row 1 end table close parentheses equals open parentheses table row cell 4. open parentheses negative 2 close parentheses plus 2.1 end cell row cell open parentheses negative 1 close parentheses. open parentheses negative 2 close parentheses plus 3.1 end cell end table close parentheses equals open parentheses table row cell negative 6 end cell row 5 end table close parentheses end style

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