Given vector

v=

, then

||v||=

\ If vector

u

is in the same direction as

v

but has norm 12 , then

u=

If vector

w

is in the opposite direction as

v

but has norm 9 , then

w=

\ (Input integers, separate by only one comma.)\ There are two unit-length vectors parallel to

v

:\ The one in the same direction as

v

is v

is (1)/(3)

as it is, not as

(2)/(6)

or

(3)/(9)

etc. Separate two numbers by only one comma.)

Given vector v=, then v= If vector u is in the same direction as v but has norm 12 , then u= If vector w is in the opposite direction as v but has norm 9 , then w=