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Byju's Answer
Standard IX
Mathematics
(x³±y³)
The value of ...
Question
The value of expression
2
+
1
2
×
2
×
2
+
1
×
1
×
1
is equal to
A
1
2
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B
1
3
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C
1
5
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D
1
1
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Solution
The correct option is
B
1
3
On taking a = 2 and b = 1, the given expression becomes
a
+
b
a
3
+
b
3
=
a
+
b
(
a
+
b
)
(
a
2
−
a
b
+
b
2
)
=
1
(
a
2
−
a
b
+
b
2
)
=
1
(
2
2
−
2
×
1
+
1
2
)
=
1
(
4
−
2
+
1
)
=
1
3
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0
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