Question

Soal matematika
Soal pilihan ganda

Jawab beserta langkah-langkahnya

DILARANG menjawab secara asal/spam/hanya ingin mengambil poin
Melanggar = Warn + Segel
Tanpa penjelasan = Hapus​

Answer 1

Jawaban:

B

Penjelasan dengan langkah-langkah:

SPLTV bentuk MATRIKS

x(2, 5, –2) + y(–1, –6, 5) = (–7, –21, 2z – 1)

2x – y = –7...... ♥

5x –6y = –21 .... ♠

–2x + 5y = 2z – 1 .... ♪

2♠ → 10x – 12y = –42

5♥ → 10x – 5y = –35 (–)

–7y = –7

y = 1

♥ → 2x – y = –7

2x = y – 7

2x = 1 – 7

2x = –6

x = –3

♪→ –2x + 5y = 2z – 1

–2(–3) + 5(1) = 2z – 1

6 + 5 + 1 = 2z

2z = 12

z = 6

Nilai dari ⅓x – y + (1/6)z

= –3/3 – 1 + 6/6

= –2 + 1

= –1 ✔