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CBSE XII
>>
Math
>>
Determinants
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Q)
If
Δ
=
|
a
1
1
a
1
2
a
1
3
a
2
1
a
2
2
a
2
3
a
3
1
a
3
2
a
3
3
|
and
A
y
is Cofactor of
a
y
, then value of
Δ
is:
(
A
)
a
11
A
31
+
a
12
A
32
+
a
13
A
33
(
B
)
a
11
A
11
+
a
12
A
21
+
a
13
A
31
(
C
)
a
21
A
11
+
a
22
A
12
+
a
23
A
13
(
D
)
a
11
A
11
+
a
21
A
21
+
a
31
A
31
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