To express the given values to three decimal places, we need to convert each fraction into a decimal format.

1. **Convert $ x = \frac{9}{5} $:**
$$
x = \frac{9}{5} = 1.8
$$

2. **Convert $ y = -\frac{1}{5} $:**
$$
y = -\frac{1}{5} = -0.2
$$

3. **Convert $ \lambda = \frac{8}{5} $:**
$$
\lambda = \frac{8}{5} = 1.6
$$

4. **Convert $ f(x, y) = 4 $:**
$$
f(x, y) = 4.000
$$

### Final Answer
The values rounded to three decimal places are:
- $ x = 1.800 $
- $ y = -0.200 $
- $ \lambda = 1.600 $
- $ f(x, y) = 4.000 $

Question

To express the given values to three decimal places, we need to convert each fraction into a decimal format.

1. **Convert $ x = \frac{9}{5} $:**
   $$
   x = \frac{9}{5} = 1.8
   $$

2. **Convert $ y = -\frac{1}{5} $:**
   $$
   y = -\frac{1}{5} = -0.2
   $$

3. **Convert $ \lambda = \frac{8}{5} $:**
   $$
   \lambda = \frac{8}{5} = 1.6
   $$

4. **Convert $ f(x, y) = 4 $:**
   $$
   f(x, y) = 4.000
   $$

### Final Answer
The values rounded to three decimal places are:
- $ x = 1.800 $
- $ y = -0.200 $
- $ \lambda = 1.600 $
- $ f(x, y) = 4.000 $

Knowee AI · Accepted Answer

To express the given values to three decimal places, we need to convert each fraction into a decimal format.

1. **Convert $ x = \frac{9}{5} $:**
   $$
   x = \frac{9}{5} = 1.8
   $$

2. **Convert $ y = -\frac{1}{5} $:**
   $$
   y = -\frac{1}{5} = -0.2
   $$

3. **Convert $ \lambda = \frac{8}{5} $:**
   $$
   \lambda = \frac{8}{5} = 1.6
   $$

4. **Convert $ f(x, y) = 4 $:**
   $$
   f(x, y) = 4.000
   $$

### Final Answer
The values rounded to three decimal places are:
- $ x = 1.800 $
- $ y = -0.200 $
- $ \lambda = 1.600 $
- $ f(x, y) = 4.000 $

So, the optimal point is located at x = 9/5, y = -1/5, with λ = 8/5, and f(x, y) = 4. give these in 3dp