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Mathematics
Mathematics
Problem
Prove that the straight line
l
x
+
m
y
+
n
=
0
lx + my + n = 0
l
x
+
m
y
+
n
=
0
touches the parabola
y
2
=
4
a
x
y^2 = 4ax
y
2
=
4
a
x
, if
l
n
=
a
m
2
ln = am^2
l
n
=
a
m
2
.
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