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Mathematics
Mathematics
Problem
If one end of a focal chord
A
B
AB
A
B
of the parabola
y
2
=
8
x
y^2 = 8x
y
2
=
8
x
is at
A
(
1
2
,
−
2
)
A\left(\frac{1}{2}, -2\right)
A
(
2
1
,
−
2
)
, then the equation of the tangent to it at
B
B
B
is (a)
x
−
2
y
+
8
=
0
x - 2y + 8 = 0
x
−
2
y
+
8
=
0
(b)
x
+
2
y
+
8
=
0
x + 2y + 8 = 0
x
+
2
y
+
8
=
0
(c)
2
x
+
y
−
24
=
0
2x + y - 24 = 0
2
x
+
y
−
24
=
0
(d)
2
x
−
y
−
24
=
0
2x - y - 24 = 0
2
x
−
y
−
24
=
0
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