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Byju's Answer
Standard XII
Physics
Kepler's Law
The binary op...
Question
The binary operation
⋆
on R is defined by
a
⋆
b
=
2
a
+
b
. Find
(
2
⋆
3
)
⋆
4
.
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Solution
Given,
The binary operation
⋆
on R is defined by
a
⋆
b
=
2
a
+
b
.
2
⋆
3
=
2
×
2
+
3
=
4
+
3
=
7
.
∴
(
2
⋆
3
)
⋆
4
=
7
⋆
4
=
2
×
7
+
4
=
14
+
4
=
18
.
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