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1. (F + G)^-1(x) of f(x) = 2x, and g(x) = x + 1

2. F(x) = 2x and G(x) = x; graph F - G.

3. F(x) = ex and G(x) = e-x; graph F + G.

4. F(x) = 2x and G(x) = x; graph F/G.