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Question
Mathematics
If the sum of slopes of the lines given by x2 - 4pxy + 8y2 = 0 is three times their product then p has the value
Q. If the sum of slopes of the lines given by
x
2
−
4
p
x
y
+
8
y
2
=
0
is three times their product then p has the value
1653
232
COMEDK
COMEDK 2012
Straight Lines
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A
4
1
13%
B
4
21%
C
3
29%
D
4
3
37%
Solution:
−
8
4
p
=
−
8
3
⇒
p
=
4
3