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Byju's Answer
Standard XII
Mathematics
Determinant
If 6i -3i...
Question
If
∣
∣ ∣
∣
6
i
−
3
i
1
4
3
i
−
1
20
3
i
∣
∣ ∣
∣
=
x
+
i
y
, then
A
x
=
3
,
y
=
1
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B
x
=
1
,
y
=
3
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C
x
=
0
,
y
=
3
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D
x
=
0
,
y
=
0
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Solution
The correct option is
D
x
=
0
,
y
=
0
∣
∣ ∣
∣
6
i
−
3
i
1
4
3
i
−
1
20
3
i
∣
∣ ∣
∣
=
x
+
i
y
⇒
6
i
(
3
i
2
+
3
)
+
3
i
(
4
i
+
20
)
+
1
(
12
−
60
i
)
=
x
+
i
y
⇒
0
=
x
+
i
y
Therefore,
x
=
y
=
0
Ans: D
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0
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