PrecalculusEasyFunctions and Their Graphs ShareFunctions and Their Graphs · Easy problemFind the domain of f(x)=3x2−7f(x)=3x^2-7f(x)=3x2−7.A(∞,∞)(\infty, \infty)(∞,∞)B(−∞,−∞)(-\infty, -\infty)(−∞,−∞)C(∞,−∞)(\infty, -\infty)(∞,−∞)D(−∞,∞)(-\infty,\infty)(−∞,∞)Check Show answer Walk through it step by step Practice more like this Review this concept