Question

let u =⟨3,4⟩. what is 3u?
○ ⟨6,7⟩
○ ⟨6,12⟩
○ ⟨9,7⟩
○ ⟨9,12⟩

Explanation:

Step1: Multiply each component by 3

For a vector \(u=(a,b)\), \(ku=(ka,kb)\). Here \(u = (3,4)\) and \(k = 3\).
So, \(3\times3\), \(3\times4\)

Step2: Calculate the results

\(3\times3=9\), \(3\times4 = 12\)

Answer:

\(\langle9,12
angle\) (the fourth option)