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Byju's Answer
Standard XII
Mathematics
Special Determinants
Using propert...
Question
Using properties of determinants,prove that :
∣
∣ ∣
∣
x
+
y
x
x
5
x
+
4
y
4
x
2
x
10
x
+
8
y
8
x
3
x
∣
∣ ∣
∣
=
x
3
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Solution
∣
∣ ∣
∣
x
+
y
x
x
5
x
+
4
y
4
x
2
x
10
x
+
8
y
8
x
3
x
∣
∣ ∣
∣
,
R
3
→
R
3
−
2
R
2
R
2
→
R
2
−
4
R
1
=
∣
∣ ∣
∣
x
+
y
x
x
x
0
−
2
x
0
0
−
x
∣
∣ ∣
∣
,
expand along
R
3
=
−
x
∣
∣
∣
x
+
y
x
x
0
∣
∣
∣
=
−
x
(
0
−
x
2
)
=
x
3
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Similar questions
Q.
Using properties of determinants, prove that
⎡
⎢
⎣
x
+
y
x
x
5
x
+
4
y
4
x
2
x
10
x
+
8
y
8
x
3
x
⎤
⎥
⎦
=
x
3
Q.
Using properties of determinants, prove that:
∣
∣ ∣
∣
x
+
y
x
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x
+
4
y
4
x
2
x
10
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+
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y
8
x
3
x
∣
∣ ∣
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=
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Q.
Using properties of determinants prove the following :
∣
∣ ∣
∣
3
x
−
x
+
y
−
x
+
z
x
−
y
3
y
z
−
y
x
−
z
y
−
z
3
z
∣
∣ ∣
∣
=
3
(
x
+
y
+
z
)
(
x
y
+
y
z
+
x
z
)
.
Q.
Using properties of determinants, prove that
∣
∣ ∣ ∣
∣
(
x
+
y
)
2
z
x
z
y
z
x
(
z
+
y
)
2
x
y
z
y
x
y
(
z
+
x
)
2
∣
∣ ∣ ∣
∣
=
2
x
y
z
(
x
+
y
+
z
)
3
.
Q.
Using properties of determinants, prove that
ω
∣
∣ ∣ ∣
∣
x
y
z
x
2
y
2
z
2
y
+
z
z
+
x
x
+
y
∣
∣ ∣ ∣
∣
=
(
x
−
y
)
(
y
−
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)
(
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−
x
)
(
x
+
y
+
z
)
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