5 Find the scalar and vector components of the vector with initial point (2, 1) and
terminal point (– 5, 7) 6 Find the sum of the vectors 
ˆ
ˆ
ˆ
ˆ
ˆ
ˆ
2
,
2
4
5
a
i
j
k b
i
j
k
= −
+
= −
+
+
r
r
and 
ˆ
ˆ
ˆ
6  – 7
c
i
j
k
=
−
r