Question

Tlng djwb ya bsok dkmpl :'(

Answer 1

Menurut saya sih jawabannya 6 tapi maaf ya kalo salah

Answer 2

Diketahui: |u| = 5, |v| = 6, | u - v | = √41, | u + v | = ?

Jawab:
| u - v |² = |u|² + |v|² - 2|u||v|cosα
(√41)² = 5² + 6² - 2.5.6.cosα
41 = 25 + 36 - 60.cosα
41 = 61 - 60.cosα
41-61 = - 60.cosα
-20 = -60. cosα
cosα = 1/3

| u + v |² = |u|² + |v|² + 2|u||v|cosα
| u + v |² = 5² + 6² + 2.5.6.1/3
| u + v |² = 25 + 36 + 20
| u + v |² = 81
| u + v | = √81
| u + v | = 9
tolong "terima kasih" sama jawaban terbaiknya ya