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Problem
Problem
Find the equation of the normal to the parabola
y
2
=
4
x
y^2 = 4x
y
2
=
4
x
which is (a) parallel to the line
y
=
2
x
−
5
y = 2x - 5
y
=
2
x
−
5
. (b) perpendicular to the line
2
x
+
6
y
+
5
=
0
2x + 6y + 5 = 0
2
x
+
6
y
+
5
=
0
.
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