Question

If vector((a x (b x c)) + (b x (c x a)) + (c x (a x b))) = vector x X vector y, then ...

(a) vector x = 0 vector

(b) vector y = 0 vector

(c) vector x and y are parallel 

(d) vector x = 0 vector or vector y = 0 vector or vector(x and y) are parallel 

Answer 1

(d) vector x = 0 vector or vector y = 0 vector or vector(x and y) are parallel