1. **State the problem:** We have two resistors in parallel with total resistance $R_T = 0.75$ ohms.
One resistor $R_2$ is 2 ohms more than the other resistor $R_1$, so $R_2 = R_1 + 2$.
We want to find $R_1$ and $R_2$ given the formula for total resistance in parallel:
$$\frac{1}{R_T} = \frac{1}{R_1} + \frac{1}{R_2}$$
2. **Write the formula with given values:**
$$\frac{1}{0.75} = \frac{1}{R_1} + \frac{1}{R_1 + 2}$$
3. **Simplify the left side:**
$$\frac{1}{0.75} = \frac{4}{3}$$
So,
$$\frac{4}{3} = \frac{1}{R_1} + \frac{1}{R_1 + 2}$$
4. **Find common denominator and combine right side:**
$$\frac{1}{R_1} + \frac{1}{R_1 + 2} = \frac{(R_1 + 2) + R_1}{R_1(R_1 + 2)} = \frac{2R_1 + 2}{R_1(R_1 + 2)}$$
5. **Set equation:**
$$\frac{4}{3} = \frac{2R_1 + 2}{R_1(R_1 + 2)}$$
6. **Cross multiply:**
$$4 \cdot R_1 (R_1 + 2) = 3 (2R_1 + 2)$$
7. **Expand both sides:**
$$4 (R_1^2 + 2R_1) = 6R_1 + 6$$
$$4R_1^2 + 8R_1 = 6R_1 + 6$$
8. **Bring all terms to one side:**
$$4R_1^2 + 8R_1 - 6R_1 - 6 = 0$$
$$4R_1^2 + 2R_1 - 6 = 0$$
9. **Simplify by dividing entire equation by 2:**
$$\cancel{2} (2R_1^2 + R_1 - 3) = 0$$
$$2R_1^2 + R_1 - 3 = 0$$
10. **Solve quadratic equation:**
Use quadratic formula:
$$R_1 = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
where $a=2$, $b=1$, $c=-3$.
Calculate discriminant:
$$\Delta = 1^2 - 4 \times 2 \times (-3) = 1 + 24 = 25$$
Calculate roots:
$$R_1 = \frac{-1 \pm \sqrt{25}}{2 \times 2} = \frac{-1 \pm 5}{4}$$
11. **Find possible values:**
$$R_1 = \frac{-1 + 5}{4} = \frac{4}{4} = 1$$
$$R_1 = \frac{-1 - 5}{4} = \frac{-6}{4} = -1.5$$
Since resistance must be positive, discard $R_1 = -1.5$.
12. **Find $R_2$:**
$$R_2 = R_1 + 2 = 1 + 2 = 3$$
**Final answer:**
$$R_1 = 1 \text{ ohm}, \quad R_2 = 3 \text{ ohms}$$
Resistor Values 31Fcbb
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