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Pertanyaan

Jika P = ( 2 4 ​ − 1 3 ​ ) dan Q ( − 3 1 ​ 1 5 ​ ) maka nilai |PQ| = ...

Jika  maka nilai |PQ| = ...

  1. 160

  2. 150

  3. 140

  4. - 150

  5. - 160

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N. Mustikowati

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

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Pembahasan

begin mathsize 14px style ring operator space straight P equals open parentheses table row 2 cell negative 1 end cell row 4 3 end table close parentheses space dan space straight Q equals open parentheses table row cell negative 3 end cell 1 row 1 5 end table close parentheses  space space space straight P. straight Q space equals space open parentheses table row 2 cell negative 1 end cell row 4 3 end table close parentheses space. open parentheses table row cell negative 3 end cell 1 row 1 5 end table close parentheses  space space space space space space space space space space equals open parentheses table row cell negative 6 minus 1 end cell cell 2 minus 5 end cell row cell negative 12 plus 3 end cell cell 4 plus 15 end cell end table close parentheses  space space space space space space space space space space equals open parentheses table row cell negative 7 end cell cell negative 3 end cell row cell negative 9 end cell 19 end table close parentheses  ring operator open vertical bar PQ close vertical bar equals space ad minus bc  space space space space space space space space space space equals open parentheses negative 7 cross times 19 close parentheses minus left parenthesis negative 3 cross times negative 9 right parenthesis  space space space space space space space space space space equals negative 133 minus 27  space space space space space space space space space space equals negative 160 end style

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Selidiki apakah jika A B = C ,dengan A , B , dan C adalah matriks berordo 2 × 2 dengan det ( A )  = 0 , ,maka berlaku atau ?

20

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