9. If $\vec{a}=\{8,9,-12\}$, vector $\overrightarrow{A B}$ is in the same direction as $\vec{a}$, point $A(2,-1,7),|B A|=34$, then the coordinates of point $B$ are
9. $(18,17,-17)$.
$\overrightarrow{A B}=k \vec{a}=\{8 k, 9 k,-12 k\}$, from $|B A|=34$ we get $k=2>0$, thus $B(18,17,-17)$.