Calculus 8th Edition

If $P_1$ is $(a,b,c)$ and $P_2$ is $(d,e,f)$ then the vector from $P_1$ to $P_2$ is $\lt d-a, e-b, f-c \gt$. Subtract the corresponding coordinates of the ''from'' point from the ''to'' point.
If $P_1$ is $(a,b,c)$ and $P_2$ is $(d,e,f)$ then the vector from $P_1$ to $P_2$ is $\lt d-a, e-b, f-c \gt$. Subtract the corresponding coordinates of the ''from'' point from the ''to'' point.