Thread: combining vectors

if a=<1,-1,2> b=<3,2,1> and c=<3,1>

is it possible to add (a+c) or |a|+ |c| ?

is it possible to do: (a dot a) x b ?

Originally Posted by cottekr

if a=<1,-1,2> b=<3,2,1> and c=<3,1>

is it possible to add (a+c) or |a|+ |c| ? No, Yes
is it possible to do: (a dot a) x b ? No

Vectors need to be the same dimension to add them or take the cross product or dot product of them. and are both real numbers, so adding them is fine.