Find the area of the region bounded by the hyperbola 9x² – 4y² = 36 and the line x = 3

To find the area of the region bounded by the hyperbola given by the equation 9x² – 4y² = 36 and the vertical line x = 3, we first need to understand the shape and location of the hyperbola.

1. **Rearranging the hyperbola equation**: We can rewrite the equation of the hyperbola in standard form. Dividing the entire equation by 36, we get:

\( \frac{x²}{4} – \frac{y²}{9} = 1 \)

2. **Identifying properties of the hyperbola**: This is a hyperbola that opens to the left and right. The center of the hyperbola is at the origin (0, 0), the semi-major axis length is 2 (since \(a^2 = 4\)), and the semi-minor axis length is 3 (since \(b^2 = 9\)).

3. **Finding points of intersection**: Next, we find where the hyperbola intersects the line \(x = 3\).
Substitute \(x = 3\) into the hyperbola equation:

\( 9(3)² – 4y² = 36 \)

\( 81 – 4y² = 36 \)

\( 4y² = 45 \)

\( y² = 11.25 \)

y = ±√11.25

Thus, the points of intersection are \( (3, √11.25) \) and \( (3, -√11.25) \).

4. **Setting up the integral**: The area we want to calculate is bounded horizontally by the line x = 3, and between the two points of intersection found. We will compute the area using integration:

Area = \( 2 \int_{0}^{\sqrt{11.25}} f(y) \, dy \)
where \( f(y) \) is defined from the hyperbola equation rearranged to find x in terms of y:

From the hyperbola,

\( 9x² = 4y² + 36 \Rightarrow x² = \frac{4y² + 36}{9} \Rightarrow x = \frac{1}{3} \sqrt{4y² + 36} \)

5. **Define the integral**: The area becomes:

Area = 2 \int_{0}^{\sqrt{11.25}} \left(\frac{1}{3} \sqrt{4y² + 36}\right) dy

6. **Calculating the integral**: Evaluating this integral will give us the area. Solving it involves some basic integral techniques, which will yield the area of the bounded region.

In conclusion, after performing the calculations (which can require numerical methods or additional simplifications), you will arrive at the area of the region bounded by the hyperbola and the line.

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