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Need help with composite functions No matter how many times i read about the domain and range of composite functions, i end up confused. Hope somebody can help me out on this. f(x) = (x+2)^0.5 g(x) = x^2 + 3 i get that g[f(x)] = x+5 but the domain and range are: (>=) means greater than or equal to since i can't do the symbol x (>=) -2 y (>=) 3 Can somebody explain this? Here's another one: f(x) = 25 - x^2 g(x) = x^0.5 what is the domain and range of g[f(x)] and f[g(x)]?