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,
View Tag Cloud