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Mathematics
Mathematics
Problem
If
z
=
x
+
i
y
z = x + iy
z
=
x
+
i
y
satisfies
∣
z
∣
−
2
=
0
|z| - 2 = 0
∣
z
∣
−
2
=
0
and
∣
z
−
i
∣
−
∣
z
+
5
i
∣
=
0
|z - i| - |z + 5i| = 0
∣
z
−
i
∣
−
∣
z
+
5
i
∣
=
0
, then<br> (a)
x
+
2
y
−
4
=
0
x + 2y - 4 = 0
x
+
2
y
−
4
=
0
<br> (b)
x
2
+
y
−
4
=
0
x^2 + y - 4 = 0
x
2
+
y
−
4
=
0
<br> (c)
x
+
2
y
+
4
=
0
x + 2y + 4 = 0
x
+
2
y
+
4
=
0
<br> (d)
x
2
−
y
+
3
=
0
x^2 - y + 3 = 0
x
2
−
y
+
3
=
0
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