Question: Could someone please check my work Let D be a nonempty set and suppose that f : D - R and g: D - R.

Could someone please check my work

Let D be a nonempty set and suppose that f : D - R and g: D - R. Define the function f + g: D -> R by (f + g)(2) = f(2) + g(2) . 3. Find an example to show that strict inequality May occur . sup[(f + 9)(D)]

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