Estrada Olson
08/12/2024 · Junior High School
Find functions \( f \) and \( g \) so that \( f \circ g=H \). \( H(x)=|6 x+4| \)
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Step-by-step Solution
To find functions \( f \) and \( g \) such that \( f \circ g = H \), where \( H(x) = |6x + 4| \), we can break down the absolute value function into its components.
The absolute value function \( H(x) = |6x + 4| \) can be expressed in terms of piecewise functions. Specifically, we can define \( g(x) \) to be the linear function inside the absolute value, and then define \( f(y) \) to be the absolute value function itself.
Let's define:
\[
g(x) = 6x + 4
\]
This function takes an input \( x \) and transforms it into \( 6x + 4 \).
Next, we define \( f(y) \) as:
\[
f(y) = |y|
\]
This function takes an input \( y \) and outputs its absolute value.
Now, we can check the composition:
\[
f \circ g(x) = f(g(x)) = f(6x + 4) = |6x + 4| = H(x)
\]
Thus, we have found the functions:
\[
f(y) = |y| \quad \text{and} \quad g(x) = 6x + 4
\]
These satisfy the condition \( f \circ g = H \).
Quick Answer
\( f(y) = |y| \) and \( g(x) = 6x + 4 \)
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