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Byju's Answer
Standard XII
Chemistry
Significant Figures
Without actua...
Question
Without actually calculating the cubes, find the value of each of the following:
(
28
)
3
+
(
−
15
)
3
+
(
−
13
)
3
A
17530
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B
14850
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C
12022
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D
16380
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Solution
The correct options are
A
17530
C
16380
We know that,
I
f
(
a
+
b
+
c
)
=
0
,
t
h
e
n
a
3
+
b
3
+
c
3
=
3
a
b
c
Here,
28
+
(
−
15
)
+
(
−
13
)
=
0
∴
(
28
)
3
+
(
−
15
)
3
+
(
−
13
)
3
=
3
(
28
)
(
−
15
)
(
−
13
)
=
16380
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2
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