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NDA Math Complex Numbers
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© examsnet.com
Question : 44
Total: 66
If
z
1
and
z
2
are complex numbers with
|
z
1
|
=
|
z
2
|
,then which of the following is/are correct ?
1.
z
1
=
z
2
2. Real part of
z
1
=
Real part of
z
2
3. Imaginary part of
z
1
=
Imaginary part o
z
2
Select the correct answer using the code given below
[NDA II 2015]
1 only
2 only
3 only
None
Validate
Solution:
Let
Z
1
=
a
1
+
i
b
1
Z
2
=
a
2
+
i
b
2
|
Z
1
|
=
|
Z
2
|
√
(
a
1
)
2
+
(
b
1
)
2
=
√
(
a
2
)
2
+
(
b
2
)
2
It is true for many values of
a
1
,
a
2
&
b
1
,
b
2
.So
a
1
It is true for many values of
a
2
,and
b
1
must not equal to
b
2
© examsnet.com
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