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AP EAMCET Engineering 23 Sep 2020 Shift 1 Paper
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© examsnet.com
Question : 7
Total: 160
The directrix of the parabola
2
y
2
+
25
x
=
0
is __________
8
x
−
25
=
0
8
y
−
25
=
0
25
x
−
28
=
0
25
y
−
8
=
0
Validate
Solution:
Given Equation of parabola, is
2
y
2
+
25
x
=
0
⇒
2
y
2
=
−
25
x
⇒
y
2
=
−
25
2
x
∴
4
a
=
+
25
2
⇒
a
=
+
25
8
∴
Required equation of directrix is
x
=
a
x
=
25
8
⇒
8
x
−
25
=
0
© examsnet.com
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