Subjects algebra

Composite Function A90F4A

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1. **Problem Statement:** We are given two functions: $$f(x) = \frac{1}{3}x, \quad x \leq 3$$ and a function \(g(x)\) whose graph is a parabola opening upwards with vertex at the origin and passing through points (-1,1) and (1,1). We need to sketch the graph of the composite function \(g(f(x))\). 2. **Understanding the Functions:** - The function \(f(x) = \frac{1}{3}x\) is a linear function with slope \(\frac{1}{3}\) defined only for \(x \leq 3\). - The function \(g(x)\) is a parabola with vertex at (0,0) and points (-1,1), (1,1), which matches the standard parabola \(g(x) = x^2\). 3. **Formula for Composite Function:** The composite function \(g(f(x))\) means we substitute \(f(x)\) into \(g\): $$g(f(x)) = (f(x))^2$$ 4. **Substitute \(f(x)\) into \(g(x)\):** $$g(f(x)) = \left(\frac{1}{3}x\right)^2 = \frac{1}{9}x^2$$ 5. **Domain Consideration:** Since \(f(x)\) is defined for \(x \leq 3\), the domain of \(g(f(x))\) is also \(x \leq 3\). 6. **Summary:** - The graph of \(g(f(x))\) is a parabola opening upwards. - It is vertically compressed by a factor of \(\frac{1}{9}\) compared to \(g(x) = x^2\). - The domain is restricted to \(x \leq 3\). 7. **Final expression:** $$\boxed{g(f(x)) = \frac{1}{9}x^2, \quad x \leq 3}$$ This is the graph to sketch on the blank coordinate grid.