A) 1
B) zero
C) 2
D) none of these
Correct Answer: C
Solution :
Let e be the identity elements for the binary operations*on \[{{Q}_{0}}\]defined by \[a*b=\frac{ab}{2}\]then \[a*e=a=e*a\] for all \[a\in {{Q}_{0}}\Rightarrow \frac{ae}{2}=a\]for all \[a\in {{Q}_{0}}\] \[\Rightarrow \] \[e=2\]You need to login to perform this action.
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