We are given three functions: $f(x) = -\frac{1}{2}x^2$, $z(x) = x - 4$, and $p(x) = x + 5$. First, we need to find the composite function $z(f(p(x)))$. Then, we need to describe the transformations applied to the parent function $x^2$.

AlgebraFunction CompositionTransformations of FunctionsQuadratic FunctionsVertical CompressionHorizontal ShiftReflection
2025/6/12

1. Problem Description

We are given three functions: f(x)=12x2f(x) = -\frac{1}{2}x^2, z(x)=x4z(x) = x - 4, and p(x)=x+5p(x) = x + 5.
First, we need to find the composite function z(f(p(x)))z(f(p(x))).
Then, we need to describe the transformations applied to the parent function x2x^2.

2. Solution Steps

First, we find p(x)p(x):
p(x)=x+5p(x) = x + 5
Next, we find f(p(x))f(p(x)):
f(p(x))=f(x+5)=12(x+5)2f(p(x)) = f(x+5) = -\frac{1}{2}(x+5)^2
Finally, we find z(f(p(x)))z(f(p(x))):
z(f(p(x)))=z(12(x+5)2)=12(x+5)24z(f(p(x))) = z(-\frac{1}{2}(x+5)^2) = -\frac{1}{2}(x+5)^2 - 4
z(f(p(x)))=12(x2+10x+25)4=12x25x2524=12x25x25282=12x25x332z(f(p(x))) = -\frac{1}{2}(x^2 + 10x + 25) - 4 = -\frac{1}{2}x^2 - 5x - \frac{25}{2} - 4 = -\frac{1}{2}x^2 - 5x - \frac{25}{2} - \frac{8}{2} = -\frac{1}{2}x^2 - 5x - \frac{33}{2}
Now, let's analyze the transformations to the parent function x2x^2.
The expression is z(f(p(x)))=12(x+5)24z(f(p(x))) = -\frac{1}{2}(x+5)^2 - 4.
Reflection: Since the coefficient of the x2x^2 term is negative, there is a reflection over the x-axis.
Stretch/Compression: The coefficient is 12-\frac{1}{2}, so there is a vertical compression by a factor of 12\frac{1}{2}.
Vertical Shift: There is a vertical shift down by 4 units because of the "-4" term.
Horizontal Shift: There is a horizontal shift to the left by 5 units because of the "(x+5)" term.

3. Final Answer

1) z(f(p(x)))=12(x+5)24z(f(p(x))) = -\frac{1}{2}(x+5)^2 - 4
Reflection: Reflection over the x-axis
Stretch/Compression: Vertical compression
Vertical Shift: Vertical shift down
Horizontal Shift: Horizontal shift left

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