Find the vector equation of the line passing through (1, 2, 3) and parallel to  the
planes 
ˆ
ˆ
ˆ
(
2 )
5
r
i
j
k
⋅
−
+
=
r
 and 
ˆ
ˆ
ˆ
(3
)
6
r
i
j
k
⋅
+
+
=
r 20 Find the vector equation of the line passing through the point (1, 2, – 4) and
perpendicular to the two lines:
7
10
16
19
3
8
−
=
−
+
=
−
z
y
x
and 
15
3
x −
 = 
29
5
8
5
y
z
−
−
=
− 21