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Mathematics
Problem
If
x
−
1
l
=
y
−
2
m
=
z
+
1
n
\frac{x-1}{l} = \frac{y-2}{m} = \frac{z+1}{n}
l
x
−
1
=
m
y
−
2
=
n
z
+
1
is the equation of the line through
(
1
,
2
,
−
1
)
(1, 2, -1)
(
1
,
2
,
−
1
)
and
(
−
1
,
0
,
1
)
(-1, 0, 1)
(
−
1
,
0
,
1
)
, then
(
l
,
m
,
n
)
(l, m, n)
(
l
,
m
,
n
)
is (a)
(
−
1
,
0
,
1
)
(-1, 0, 1)
(
−
1
,
0
,
1
)
(b)
(
1
,
1
,
−
1
)
(1, 1, -1)
(
1
,
1
,
−
1
)
(c)
(
1
,
2
,
−
1
)
(1, 2, -1)
(
1
,
2
,
−
1
)
(d)
(
0
,
1
,
0
)
(0, 1, 0)
(
0
,
1
,
0
)
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