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Let f and g be two real valued functions, defined by, f(x) = x, g (x) = |x|,find f – g.

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(f– g)(x) = f(x) – g(x) = x - |x| =\(\begin{cases} 0, & \quad x\geq 0\\ 2x, & \quad x<0 \end{cases}\)

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