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Mathematics
Mathematics
Problem
Determine the value of
p
p
p
for which the line
p
x
+
4
y
−
7
=
0
px+4y-7=0
p
x
+
4
y
−
7
=
0
is perpendicular to the line
5
x
−
2
y
+
9
=
0
5x-2y+9=0
5
x
−
2
y
+
9
=
0
.
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