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Diketahui matriks A=(12​a−1​), B=(3−1​b1​) dan C=(17​4c​)Jika AB=C, maka a+b+c =......

Pertanyaan

D i k e t a h u i space m a t r i k s space A equals open parentheses table row 1 a row 2 cell negative 1 end cell end table close parentheses comma space B equals open parentheses table row 3 b row cell negative 1 end cell 1 end table close parentheses space d a n space C equals open parentheses table row 1 4 row 7 c end table close parentheses  J i k a space A B equals C comma space m a k a space a plus b plus c space equals......

  1. 3

  2. 5

  3. 7

  4. 9

  5. 11

F. Pratama

Master Teacher

Mahasiswa/Alumni Universitas Putra Indonesia YPTK Padang

Jawaban terverifikasi

Pembahasan

open parentheses table row 1 a row 2 cell negative 1 end cell end table close parentheses open parentheses table row 3 b row cell negative 1 end cell 1 end table close parentheses equals open parentheses table row 1 4 row 7 c end table close parentheses  open parentheses table row cell left parenthesis 1 right parenthesis left parenthesis 3 right parenthesis plus a left parenthesis negative 1 right parenthesis end cell cell space space space space space space left parenthesis 1 right parenthesis left parenthesis b right parenthesis plus a left parenthesis 1 right parenthesis end cell row cell left parenthesis 2 right parenthesis left parenthesis 3 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 1 right parenthesis end cell cell space space space space space left parenthesis 2 right parenthesis left parenthesis b right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis 1 right parenthesis end cell end table close parentheses equals open parentheses table row 1 4 row 7 c end table close parentheses  open parentheses table row cell 3 minus a end cell cell space space space space space space b plus a end cell row 7 cell space space space 2 b minus 1 end cell end table close parentheses equals open parentheses table row 1 4 row 7 c end table close parentheses    D i p e r o l e h space t i g a space p e r s a m a a n space  3 minus a equals 1 rightwards arrow 2 equals a space  b plus a equals 4 rightwards arrow b plus 2 equals 4 rightwards arrow b equals 2 space  2 b minus 1 equals c rightwards arrow 2 left parenthesis 2 right parenthesis minus 1 equals c rightwards arrow 3 equals c    M a k a space n i l a i space space a plus b plus c equals 2 plus 2 plus 3 equals 7

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Diketahui matriks A=(2b​a4​),B=(a2​0b​), dan C=(1211​34​) . Jika AB = C, nilai dari a + b = .....

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