Sqrt 3X 2 6D1Bae
1. **State the problem:**
We are given the function $f(x) = \sqrt{3x - 2}$ and asked to find:
- The value of the function at $x = 1$.
- The limit of the function as $x \to 1$.
2. **Formula and rules:**
The function is defined as $f(x) = \sqrt{3x - 2}$. To find the value at $x=1$, substitute directly.
To find the limit as $x \to 1$, we can use three methods: direct substitution, graphing, and tabulation.
3. **Evaluate the function at $x=1$:**
$$f(1) = \sqrt{3(1) - 2} = \sqrt{3 - 2} = \sqrt{1} = 1$$
4. **Find the limit as $x \to 1$ by direct substitution:**
Since the function is continuous at $x=1$ (the expression under the square root is positive), the limit is the same as the function value:
$$\lim_{x \to 1} \sqrt{3x - 2} = \sqrt{3(1) - 2} = 1$$
5. **Find the limit by graphing:**
The graph of $f(x) = \sqrt{3x - 2}$ is the upper half of a parabola shifted and scaled. Near $x=1$, the graph approaches the point $(1,1)$ smoothly, confirming the limit is 1.
6. **Find the limit by tabulation:**
Create a table of values approaching $x=1$ from left and right:
| $x$ | $f(x) = \sqrt{3x - 2}$ |
|-----|-----------------------|
| 0.9 | $\sqrt{3(0.9)-2} = \sqrt{2.7-2} = \sqrt{0.7} \approx 0.837$ |
| 0.99| $\sqrt{3(0.99)-2} = \sqrt{2.97-2} = \sqrt{0.97} \approx 0.985$ |
| 1.0 | 1 |
| 1.01| $\sqrt{3(1.01)-2} = \sqrt{3.03-2} = \sqrt{1.03} \approx 1.015$ |
| 1.1 | $\sqrt{3.3-2} = \sqrt{1.3} \approx 1.14$ |
Values approach 1 from both sides, confirming the limit is 1.
**Final answer:**
- $f(1) = 1$
- $\lim_{x \to 1} \sqrt{3x - 2} = 1$