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Diketahui matriks A=, B=,  dan A - B = C. Determin...

Diketahui matriks A=open parentheses table row cell 25 space space 15 end cell row cell 20 space space space 16 end cell end table close parentheses, B=open parentheses table row cell 21 space space space 24 end cell row cell 10 space space space space 20 end cell end table close parentheses,  dan A - B = C. Determinan matriks C adalah ...

 

  1. -110

  2. -90

  3. 60

  4. 74

  5. 110

Jawaban:

J i k a space C space equals open parentheses table row cell a space space b end cell row cell c space space d end cell end table close parentheses comma space m a k a  d e t. left parenthesis C right parenthesis equals open vertical bar C close vertical bar equals space a d space minus space b c  U n t u k space  C equals A space minus B  C equals open parentheses table row cell 25 space space space 15 end cell row cell 20 space space space 16 end cell end table close parentheses minus open parentheses table row cell 21 space space space 24 end cell row cell 10 space space space 20 end cell end table close parentheses  C equals open parentheses table row cell 4 space space space minus 9 end cell row cell 10 space space space space space minus 4 end cell end table close parentheses  M a k a colon  d e t. left parenthesis C right parenthesis equals open vertical bar C close vertical bar minus 16 minus left parenthesis negative 90 right parenthesis equals 74

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