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Show that: ∣ ∣ ​ 1 a 2 a 3 ​ ​ 1 b 2 b 3 ​ 1 c 2 c 3 ​ ∣ ∣ ​ = ( b − a ) ( c − a ) ( c − b ) ( b c + a c + ab )

Show that:

     

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I. Sutiawan

Master Teacher

Mahasiswa/Alumni Universitas Pasundan

Jawaban terverifikasi

Jawaban

dari uraian di atas, persamaan adalah persamaan yang benar.

dari uraian di atas, persamaan begin mathsize 12px style open vertical bar table row 1 1 1 row cell a squared end cell cell b squared end cell cell c squared end cell row cell table row cell a cubed end cell end table end cell cell b cubed end cell cell c cubed end cell end table close vertical bar equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis left parenthesis c minus b right parenthesis left parenthesis b c plus a c plus a b right parenthesis end style adalah persamaan yang benar.

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Pembahasan

Dengan cara Sarrus, maka: Sehingga: Jadi dari uraian di atas, persamaan adalah persamaan yang benar.

Dengan cara Sarrus, maka:

begin mathsize 12px style open vertical bar table row 1 1 1 row cell a squared end cell cell b squared end cell cell c squared end cell row cell table row cell a cubed end cell end table end cell cell b cubed end cell cell c cubed end cell end table close vertical bar table row 1 1 row cell a squared end cell cell b squared end cell row cell table row cell a cubed end cell end table end cell cell b cubed end cell end table equals b squared c cubed plus a cubed c squared plus a squared b cubed minus a cubed b squared minus b cubed c squared minus a squared c cubed equals left parenthesis c squared minus b squared right parenthesis a cubed plus left parenthesis b cubed minus c cubed right parenthesis a squared plus left parenthesis b squared c squared minus b cubed c squared right parenthesis equals left parenthesis b minus a right parenthesis open square brackets left parenthesis c squared minus b right parenthesis a squared plus left parenthesis negative c cubed plus c squared b right parenthesis a plus left parenthesis negative b c cubed plus b squared c squared right parenthesis close square brackets equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis open square brackets left parenthesis c squared minus b squared right parenthesis a plus left parenthesis c squared b minus b squared c right parenthesis close square brackets equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis open square brackets left parenthesis c plus b right parenthesis left parenthesis c minus b right parenthesis left parenthesis a right parenthesis plus left parenthesis b c left parenthesis c minus b right parenthesis close square brackets equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis left parenthesis c minus b right parenthesis left parenthesis a left parenthesis c plus b right parenthesis plus b c right parenthesis equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis left parenthesis c minus b right parenthesis left parenthesis b c plus a c plus a b right parenthesis end style 

Sehingga:

begin mathsize 12px style open vertical bar table row 1 1 1 row cell a squared end cell cell b squared end cell cell c squared end cell row cell table row cell a cubed end cell end table end cell cell b cubed end cell cell c cubed end cell end table close vertical bar equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis left parenthesis c minus b right parenthesis left parenthesis b c plus a c plus a b right parenthesis end style 

Jadi dari uraian di atas, persamaan begin mathsize 12px style open vertical bar table row 1 1 1 row cell a squared end cell cell b squared end cell cell c squared end cell row cell table row cell a cubed end cell end table end cell cell b cubed end cell cell c cubed end cell end table close vertical bar equals left parenthesis b minus a right parenthesis left parenthesis c minus a right parenthesis left parenthesis c minus b right parenthesis left parenthesis b c plus a c plus a b right parenthesis end style adalah persamaan yang benar.

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Pertanyaan serupa

Tentukan nilai determinan di bawah ini berdasarkan cara Sarrus-Kino. pindahkan baris pertama menjadi baris keempat dan baris kedua menjadi baris kelima.

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