Question

given vectors u = (-2, 4) v= (4, 2), determine the quantity indicated below: (u multiplied by 4v)u... I got (0,0) is this correct?

Answer 1

i used the dot product and it gave me 0

Answer 2

u x v?
thats cross product

Answer 3

u . v is dot product

Answer 4

idk how to do cross product?

Answer 5

yes and the dot product gave me 0

Answer 6

in question , what is the sign ?>
X or .
?

Answer 7

dot product = 0 is correct.

Answer 8

u said multiplied. but for vectors, we need to know if its dot or cross

Answer 9

so is the answer (0, 0) correct when I use (u . 4v)u?

Answer 10

yes.