Tolong bantu ya ini materi vektor
Jawaban:
-4
Penjelasan dengan langkah-langkah:
a . b = | a | . | b | . cos Ѳ
a . b = | a | . | b | . cos 90°
a . b = | a | . | b | . 0 = 0
a . b = (7, 3, 4) . (p, 8, 1) = 0
a . b = 7 . p + 3 . 8 + 4 . 1 = 0
a . b = 7p + 24 + 4 = 0
a . b = 7p + 28 = 0
7p = – 28
Semoga Membantu:)