Question

let u= (2,3,-1) and v= (0,-2,3)
a. determine u+v=
b. -2u=

Answer 1

Answer on Question #59886 – Math – Linear Algebra

Question

Let $u = (2,3,-1)$ and $v = (0,-2,3)$.

Determine

a. $u + v =$;

b. $-2u =$.

Solution

a. $u + v = (2\quad 3\quad -1) + (0\quad -2\quad 3) = (2 + 0\quad 3 - 2\quad -1 + 3) = (2\quad 1\quad 2)$;

b. $-2u = -2(2\quad 3\quad -1) = (-2\cdot 2\quad -2\cdot 3\quad -2\cdot (-1)) = (-4\quad -6\quad 2)$.

Answer: a. $u + v = (2\quad 1\quad 2)$;

b. $-2u = (-4\quad -6\quad 2)$.

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