1. Problem: Given functions $f(x) = 4x - 1$, $g(x) = x^2 - 5$, and $h(x) = 3^x$, find:
1.i. $g(x - 2)$ in simplest form.
1.ii. $f^{-1}(11)$ (the inverse of $f$ evaluated at 11).
1.iii. $hh(1)$ (composition of $h$ with itself at 1).
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2. Formula and rules:
- To find $g(x - 2)$, substitute $x - 2$ into $g(x)$.
- To find $f^{-1}(y)$, solve $y = f(x)$ for $x$.
- To find $hh(1)$, compute $h(h(1))$.
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3. Step-by-step solutions:
1.i.
$$g(x - 2) = (x - 2)^2 - 5$$
Expand the square:
$$= (x^2 - 4x + 4) - 5$$
Simplify:
$$= x^2 - 4x - 1$$
1.ii.
Given $f(x) = 4x - 1$, find $f^{-1}(11)$.
Set $y = 4x - 1$ and solve for $x$:
$$y = 4x - 1$$
Add 1 to both sides:
$$y + 1 = 4x$$
Divide both sides by 4:
$$x = \frac{y + 1}{4}$$
Using \cancel to show division:
$$x = \frac{\cancel{y + 1}}{\cancel{4}}$$
Substitute $y = 11$:
$$f^{-1}(11) = \frac{11 + 1}{4} = \frac{12}{4} = 3$$
1.iii.
Calculate $hh(1) = h(h(1))$.
First find $h(1)$:
$$h(1) = 3^1 = 3$$
Then find $h(3)$:
$$h(3) = 3^3 = 27$$
Therefore,
$$hh(1) = 27$$
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Final answers:
1.i. $g(x - 2) = x^2 - 4x - 1$
1.ii. $f^{-1}(11) = 3$
1.iii. $hh(1) = 27$
Function Evaluation 0Dcdb7
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