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Standard VIII
Mathematics
Question
I
3
(
m
−
n
)
3
+
m
3
(
n
−
1
)
3
+
n
3
(
I
−
m
)
3
equals to ______.
3
I
m
n
(
m
−
n
)
(
n
−
1
)
(
I
−
m
)
0
none of these
(
I
I
m
n
)
3
(
I
−
m
)
(
m
−
n
)
(
n
−
1
)
(
I
m
+
m
n
+
n
l
)
(
3
I
2
M
2
N
2
)
A
(
I
I
m
n
)
3
(
I
−
m
)
(
m
−
n
)
(
n
−
1
)
B
0
C
(
I
m
+
m
n
+
n
l
)
(
3
I
2
M
2
N
2
)
D
3
I
m
n
(
m
−
n
)
(
n
−
1
)
(
I
−
m
)
E
none of these
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Solution
Verified by Toppr
I
3
(
m
−
n
)
3
+
m
3
(
n
−
1
)
3
+
n
3
(
I
−
m
)
3
=
I
3
[
(
m
)
3
−
(
n
)
3
−
I
(
m
n
)
(
m
−
n
)
]
+
m
3
(
n
)
3
−
(
1
)
3
−
3
(
x
)
(
x
−
1
)
+
n
3
(
I
)
3
−
(
m
)
3
(
m
I
)
(
I
−
m
)
=
I
3
[
m
3
−
n
3
−
3
m
n
(
m
−
n
)
]
+
m
3
[
n
3
−
1
−
3
n
(
n
−
1
)
]
+
n
3
[
I
3
−
m
3
−
3
m
I
(
I
−
m
)
]
=
m
3
I
3
−
n
3
I
3
−
3
m
2
n
I
3
+
3
m
n
2
I
2
+
m
3
n
3
−
m
3
−
3
n
2
m
3
+
3
n
m
3
+
n
3
I
3
−
n
m
3
−
3
m
I
2
n
3
+
3
m
2
n
3
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3
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n
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(
I
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equals to ______.
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