1. **State the problem:**
We have three functions:
$$f(x) = \frac{3}{x+2}, \quad g(x) = 4x - 5, \quad h(x) = x^2 + 1.$$
We need to find:
(i) The value of $x$ for which $f(x)$ is undefined.
(ii) The values of:
a) $g\left(\frac{1}{4}\right)$
b) $h(-3)$
c) $f(f'(0))$
2. **Find when $f(x)$ is undefined:**
$f(x)$ is undefined when the denominator is zero:
$$x + 2 = 0$$
$$x = -2$$
3. **Calculate $g\left(\frac{1}{4}\right)$:**
Substitute $x = \frac{1}{4}$ into $g(x)$:
$$g\left(\frac{1}{4}\right) = 4 \times \frac{1}{4} - 5 = 1 - 5 = -4$$
4. **Calculate $h(-3)$:**
Substitute $x = -3$ into $h(x)$:
$$h(-3) = (-3)^2 + 1 = 9 + 1 = 10$$
5. **Calculate $f(f'(0))$:**
First, find the derivative $f'(x)$ of $f(x) = \frac{3}{x+2}$:
Rewrite $f(x)$ as:
$$f(x) = 3(x+2)^{-1}$$
Using the power rule and chain rule:
$$f'(x) = 3 \times (-1)(x+2)^{-2} \times 1 = -\frac{3}{(x+2)^2}$$
Evaluate $f'(0)$:
$$f'(0) = -\frac{3}{(0+2)^2} = -\frac{3}{4}$$
Now find $f\left(f'(0)\right) = f\left(-\frac{3}{4}\right)$:
$$f\left(-\frac{3}{4}\right) = \frac{3}{-\frac{3}{4} + 2} = \frac{3}{-\frac{3}{4} + \frac{8}{4}} = \frac{3}{\frac{5}{4}} = 3 \times \frac{4}{5} = \frac{12}{5}$$
**Final answers:**
(i) $x = -2$
(ii) a) $-4$
b) $10$
c) $\frac{12}{5}$
Function Values 69D7Bb
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