1.

If f(x) is a real valued odd function , then which one of the following is incorrect ?A. `(f(x)-f-(-x))/(2)` is an odd function.B. `(f(x)+f(-x))/(2)` is an even function.C. `[|f(x)|+2]` is an even function, `[*]` denotes the greatest integer function.D. `(f(x)-f(-x))/(2)` is neither even nor odd.

Answer» Correct Answer - D
We observe that
`phi(x)=(f(x)+f(-x))/(2)` is an even function .
`and Psi(x)=(f(x)-f(-x))/(2)` is an odd functions.
Let `g(x)=[|f(x)|+2]`. Then,
`g(-x)=[|f(-x)|+2]`
`implies g(-x)=[|-f(x)|+2]`
`=g(-x)=[|f(x)|+2]`
`implies g(-x)=g(x)` for all ` x in R `.
Therefore, g(x) is an even function.


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