matematika bab vektor, tolong duanya yaa kk

Nyoba

u = 3i - 4j
v = 5i +2j
u-v = (3,-4)-(5,2)
=(-2,-6)

c = (u-v) . u / |u|
=(-2,-6)(3,-4) / √(3²+(-4)²)
= -6+24 / √(9+16)
= 18/√25
=18/5

Tidak ada jawaban di Pilihan ganda

apa yang salah?

nyoba juga
u = 3i - 4j
v = 5i + 2j
(u - v) = (3-5 , -4-2) = (-2,-6)

c = (u-v).v /√ |u|²
= (-2,-6)(-4,-2)/√(3² + (-4)²)
= (8+12)/√25
= 20/5
= (20/5)
= 4