Question

let u = (5, -12) and c = -3. what is IIcuII?

Answer 1

Answer:

39

Step-by-step explanation:

Assuming u is a vector and c is a scalar.

$c\bold{u} = -3\left[\begin{array}{c}5\\-12\end{array}\right]\\c\bold{u} = \left[\begin{array}{c}-15\\36\end{array}\right]\\\\||c\bold{u}|| = \sqrt{15^2 + 36^2} = 39$

where || || is the norm  or length of the vector.