Find the unit vector perpendicular to the plane ABC where the position
vectors of A, B and C are 2
^i
–
^j
+
^
k ,
^i
+
^j
+ 2
^
k and 2
^i
+ 3
^
k
respectively.
vectors of A, B and C are 2
^i
–
^j
+
^
k ,
^i
+
^j
+ 2
^
k and 2
^i
+ 3
^
k
respectively.