Roboguru

Pertanyaan

Diketahui matriks straight P equals open parentheses table row cell 2 straight a plus straight b end cell straight c row 10 cell negative 3 end cell end table close parentheses comma space straight Q equals open parentheses table row 5 cell straight a plus straight b end cell row cell 5 straight a end cell cell negative 3 end cell end table close parentheses comma space dan space straight R space equals space open parentheses table row 10 straight b row 20 cell negative 6 end cell end table close parentheses. Nilai dari a + b yang memenuhi P + Q = R adalah ...

  1. 7

  2. 6

  3. 5

  4. 4

  5. 3

R. Diah

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

P+Q= R

open parentheses table row cell 2 a plus b end cell c row 10 cell negative 3 end cell end table close parentheses plus open parentheses table row 5 cell a plus b end cell row cell 5 a end cell cell negative 3 end cell end table close parentheses equals open parentheses table row 10 b row 20 cell negative 6 end cell end table close parentheses  open parentheses table row cell 2 a plus b plus 5 end cell cell c plus a plus b end cell row cell 10 plus 5 a end cell cell negative 3 minus 3 end cell end table close parentheses equals open parentheses table row 10 b row 20 cell negative 6 end cell end table close parentheses  open parentheses table row cell 2 a plus b plus 5 end cell cell c plus a plus b end cell row cell 10 plus 5 a end cell cell negative 6 end cell end table close parentheses equals open parentheses table row 10 b row 20 cell negative 6 end cell end table close parentheses  10 plus 5 a equals 20  5 a equals 10  a equals 2  S u b s t i t u s i k a n space n i l a i space a equals 2 space k e space p e r s a m a a n  2 a plus b plus 5 equals 10  2 left parenthesis 2 right parenthesis plus b plus 5 equals 10  b plus 9 equals 10  b equals 1  J a d i comma space n i l a i space a plus b equals 2 plus 1 equals 3

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