Find the equation of the plane passing through (a, b, c) and parallel to the plane
ˆ
ˆ
ˆ
(
)
2 r
i
j
k
⋅ + + =
r
9 Find the shortest distance between lines 
ˆ
ˆ
ˆ
ˆ
ˆ
ˆ
6
2
2
(
2
2
)
r
i
j
k
i
j
k
=
+
+
+ λ
−
+
r
and 
ˆ
ˆ
ˆ
ˆ
ˆ
4
(3
2
2
)
r
i
k
i
j
k
= −
−
+ µ
−
−
r 10