Permisi kak mohon bantuannya pliss​

Penjelasan dengan langkah-langkah:

̄p⃗ = (2 3 -1)

4p⃗ = (4×2 4×3 4(-1) )

4p⃗ = (8 12 -4)

q⃗ = (1 4 5)

2q⃗ = (2 8 10)

-4q⃗ =(-4 -16 -20)

4p⃗ +3r⃗ +2q⃗ = p⃗ -4q⃗

(8 12 -4) +3r⃗ + (2 8 10) = (2 3 -1) +(-4 -16 -20)

3r⃗ = (2-4-2-8 3-16-8-12 -1-20-10+4)

= (-12 -33 -27)

r⃗ = (-12/3 -33/3 -27/3)

r⃗ = (–4 –11 –9)

vektor r = –4i –11j –9k