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Mathematics
Problem
The vector equation of the line joining the points
i
−
2
j
+
k
i - 2j + k
i
−
2
j
+
k
and
−
2
j
+
3
k
-2j + 3k
−
2
j
+
3
k
is (a)
r
=
t
(
i
+
j
+
k
)
r = t(i + j + k)
r
=
t
(
i
+
j
+
k
)
(b)
r
=
t
1
(
i
−
2
j
+
k
)
+
t
2
(
3
k
−
2
j
)
r = t_1(i - 2j + k) + t_2(3k - 2j)
r
=
t
1
(
i
−
2
j
+
k
)
+
t
2
(
3
k
−
2
j
)
(c)
r
=
(
i
−
2
j
+
k
)
+
t
(
2
k
−
i
)
r = (i - 2j + k) + t(2k - i)
r
=
(
i
−
2
j
+
k
)
+
t
(
2
k
−
i
)
(d)
r
=
t
(
2
k
−
i
)
r = t(2k - i)
r
=
t
(
2
k
−
i
)
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