Question

Need help
Given u = ⟨root3, -1⟩ and v = ⟨3, –4⟩, what is u · v?

Answer 1

3
`√(3)` + 4

Explanation:

If u = < x₁, y₁ > and v = <x₂ , y₂ > , then

u • v = x₁x₂ + y₁y₂

Given

u = <
`√(3)`, - 1 > and v = < 3, - 4 >, then

u • v = 3
`√(3)` + (- 1)(- 4) = 3
`√(3)` + 4