Let `D = { x in R : f(x) = sqrt((x - |x|)/(x - |x|)) "is difined"}`
and C be the range of the real function
`g(x) = (2x)/(4 + x^(2)). "then" D cap C = `

Options

A. `[-(1)/(2),(1)/(2)]`
B. `(0,(1)/(2))`
C. `R^(+)`
D. `R^(+)-Z^(+)`

Answer

B