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AP and TS EAMCET Engineering Model Paper 12
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© examsnet.com
Question : 67
Total: 160
If
2
x
+
y
+
λ
=
0
is a normal to the parabola
y
2
=
−
8
x
,
then
λ
is
12
-12
24
-24
Validate
Solution:
y
2
=
−
8
x
d
y
d
x
=
−
8
2
y
slope of normal
=
y
4
⇒
y
=
−
8
⇒
x
=
64
−
8
=
−
8
λ
=
−
2
x
−
y
=
16
+
8
=
24
© examsnet.com
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