Show that the magnitude of a vector u is equal to (u x u)^1/2
If a x b = a x c, does a = b? Justify your answer.
I think you mean the square root of the dot product rather than the cross product ...Show that the magnitude of a vector u is equal to (u x u)^1/2
$\displaystyle |\vec{u}| = (\vec{u} \cdot \vec{u})^{\frac{1}{2}}$
are you sure the statement isn'tIf a x b = a x c, does a = b? Justify your answer.
"If a x b = a x c, does b = c ?"