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Mathematics
Mathematics
Problem
The equation of the plane perpendicular to the line
x
−
1
1
=
y
−
2
−
1
=
z
+
1
2
\frac{x-1}{1}=\frac{y-2}{-1}=\frac{z+1}{2}
1
x
−
1
=
−
1
y
−
2
=
2
z
+
1
and passing through the point
(
2
,
3
,
1
)
(2, 3, 1)
(
2
,
3
,
1
)
, is a.
r
.
(
i
^
+
j
^
+
2
k
^
)
=
1
r. (\hat{i} + \hat{j} + 2\hat{k}) = 1
r
.
(
i
^
+
j
^
+
2
k
^
)
=
1
b.
r
.
(
i
^
−
j
^
+
2
k
^
)
=
1
r. (\hat{i} - \hat{j} + 2\hat{k}) = 1
r
.
(
i
^
−
j
^
+
2
k
^
)
=
1
c.
r
.
(
i
^
−
j
^
+
2
k
^
)
=
7
r. (\hat{i} - \hat{j} + 2\hat{k}) = 7
r
.
(
i
^
−
j
^
+
2
k
^
)
=
7
d. None of these
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