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Byju's Answer
Standard XII
Mathematics
Complex Numbers
The complex n...
Question
The complex number which satisfies the equation
z
+
√
2
|
z
+
1
|
+
i
=
0
is
A
2
−
i
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B
−
2
−
i
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C
2
+
i
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D
−
2
+
i
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Solution
The correct option is
B
−
2
−
i
Since
z
+
√
2
|
z
+
1
|
+
i
=
0
∴
x
+
i
(
y
+
1
)
+
√
2
|
x
+
i
y
+
1
|
=
0
By comparing real and imaginary parts
⇒
y
+
1
=
0
(
∵
|
x
+
i
y
+
1
|
is real
)
⇒
y
=
−
1
∴
x
+
√
2
|
x
−
i
+
1
|
=
0
⇒
x
2
=
2
(
(
x
+
1
)
2
+
1
)
=
2
(
x
2
+
2
x
+
2
)
⇒
x
2
+
4
x
+
4
=
0
⇒
(
x
+
2
)
2
=
0
⇒
x
=
−
2
∴
z
=
−
2
−
i
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