need to explain why these are not valid, or meaningless. 1. a x (b*c) 2. (a*b) x c 3. (a*b) x (c*d) not sure whats wrong with each of them, thankyou for any help.
Follow Math Help Forum on Facebook and Google+
Recall that the dot product between two vectors gives you a number. Also recall that the cross product is defined between two vectors, not numbers. Can you see what's wrong with your expressions?
okay, so each of those have a problem because two vectors multiplied will give a number. and then its a number x a vector, which can't happen for the cross product which looks like the case for each of them, correct?
View Tag Cloud