Pregunta
How does the graph of \( f(x)=2^{x+2} \) compare to the graph of \( g(x)=2^{x}+2 \) ? The graph of \( f(x) \) is a translation of the parent function \( h(x)=2^{x} \square \) unit(s) \( \square \) whereas the graph of \( g(x) \) is a translation of the parent function \( h(x)=2^{x} \) unit(s) (Type whole numbers.)
Ask by Parry Weaver. in the United States
Jan 24,2025
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The graph of \( f(x) = 2^{x+2} \) is a horizontal shift of the parent function \( h(x) = 2^{x} \) **2 units to the left**, while the graph of \( g(x) = 2^{x} + 2 \) is a vertical shift of \( h(x) = 2^{x} \) **2 units upward**.
Solución
The graph of \( f(x) = 2^{x+2} \) and \( g(x) = 2^{x} + 2 \) can be compared to the parent function \( h(x) = 2^{x} \) through translations.
1. **For \( f(x) = 2^{x+2} \):**
- **Translation Type:** Horizontal shift
- **Units:** 2 units to the **left**
**Explanation:** The expression \( x + 2 \) inside the exponent indicates a shift to the left by 2 units. This is because adding a positive number inside the function argument moves the graph in the opposite direction on the x-axis.
2. **For \( g(x) = 2^{x} + 2 \):**
- **Translation Type:** Vertical shift
- **Units:** 2 units **up**
**Explanation:** Adding 2 outside the exponent shifts the graph upward by 2 units. This affects all y-values, moving the entire graph higher on the y-axis.
**Summary:**
- **\( f(x) = 2^{x+2} \)** is a translation of \( h(x) = 2^{x} \) **2 units to the left**.
- **\( g(x) = 2^{x} + 2 \)** is a translation of \( h(x) = 2^{x} \) **2 units upward**.
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Beyond the Answer
The graph of \( f(x)=2^{x+2} \) is a translation of the parent function \( h(x)=2^{x} \) 2 units to the left, because the additive constant in the exponent shifts the entire graph leftward. Meanwhile, the graph of \( g(x)=2^{x}+2 \) is a translation of the parent function \( h(x)=2^{x} \) 2 units upward, as the constant added outside the function raises the entire graph. So, both functions depict shifts but in different directions!
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