# Vectors

#### PlsHelp2604

##### New member
a = (1) and b = (3)
........(4)...................(2)

(a) Write down as a column vector
(i) a+b

A translation by ( ? )
( ? )

#### markraz

##### Full Member
column vector is like a column in excel add the two columns keeping the variable independent
is A 1,4 and B is 3,2?
if so it would look like this

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#### Subhotosh Khan

##### Super Moderator
Staff member
a = (1) and b = (3)
........(4)...................(2)

(a) Write down as a column vector
(i) a+b

A translation by ( ? )
( ? )
Is that your thought or was it included in the assignment?

#### HallsofIvy

##### Elite Member
If $$\displaystyle u= \begin{bmatrix} a \\ b \end{bmatrix}$$ and $$\displaystyle v= \begin{bmatrix} c \\ d \end{bmatrix}$$ then $$\displaystyle u+ v= \begin{bmatrix} a \\ b \end{bmatrix}+ \begin{bmatrix} c \\ d \end{bmatrix}= \begin{bmatrix} a+ c \\ b+ d \end{bmatrix}$$

I don't know what "A translation by (?)" means. It might be asking you to think of translating a by b.