A) \[f(x)=log\,\,x,x>0\]
B) \[f(x)={{e}^{x}},x\in R\]
C) \[f(x)=x-[x],x\in R\]
D) \[f(x)=x+[x],x\in R\]
Correct Answer: C
Solution :
[c] \[f(x)=logx\] is not periodic.; \[f(x)={{e}^{x}}\], is not periodic. \[f(x)=x-[x]=\{x\},\] has period \[1;f(x)=x+[x]\], is not periodic.
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