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Byju's Answer
Standard X
Mathematics
Equation of a Line Perpendicular to a Given Line
find the valu...
Question
find the value of k so that the lines -x + y + 3 and kx + 2y = 8 will be parallel.
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Solution
The
given
equations
are
:
-
x
+
y
=
-
3
.
.
.
.
.
.
.
.
.
.
.
i
kx
+
2
y
=
8
.
.
.
.
.
.
.
.
.
.
.
.
ii
For
the
given
lines
to
be
parallel
a
1
a
2
=
b
1
b
2
≠
c
1
c
2
⇒
-
1
k
=
1
2
≠
-
3
8
Therefore
,
from
the
equation
-
1
k
=
1
2
,
we
get
k
=
-
2
Hence
,
the
required
value
of
k
is
-
2
.
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0
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