For what value of λ are the vector 
and 
perpendicular to each other? Where :
and 
Now
2 × 3 + 3 × 2 + 4 × (-λ) = 0
- 4 λ = - 12
λ = 3
2
For what value of λ are the vector and perpendicular to each other? Where :
and
Now
2 × 3 + 3 × 2 + 4 × (-λ) = 0
- 4 λ = - 12
λ = 3