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Equation of the hyperbola whose axes are...

Equation of the hyperbola whose axes are the axes of coordinates (focus lying on x-axis) and which passes through the point `(-3, 1)` and has eccentricity `sqrt(3)` can be

A

`x^(2)-3y^(2)=6`

B

`x^(2)-2y^(2)=7`

C

`3x^(2)-y^(2)=7`

D

`2x^(2)-y^(2)=17`

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The correct Answer is:
To find the equation of the hyperbola whose axes are the coordinate axes, with a focus on the x-axis, passing through the point (-3, 1) and having an eccentricity of √3, we can follow these steps: ### Step 1: Write the standard form of the hyperbola The standard equation of a hyperbola with a horizontal transverse axis is given by: \[ \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 \] ### Step 2: Use the eccentricity The eccentricity \( e \) of a hyperbola is given by the formula: \[ e = \sqrt{1 + \frac{b^2}{a^2}} \] Given that \( e = \sqrt{3} \), we can square both sides: \[ 3 = 1 + \frac{b^2}{a^2} \] This simplifies to: \[ \frac{b^2}{a^2} = 2 \] From this, we can express \( b^2 \) in terms of \( a^2 \): \[ b^2 = 2a^2 \tag{1} \] ### Step 3: Substitute the point into the hyperbola equation Since the hyperbola passes through the point (-3, 1), we substitute \( x = -3 \) and \( y = 1 \) into the hyperbola equation: \[ \frac{(-3)^2}{a^2} - \frac{1^2}{b^2} = 1 \] This simplifies to: \[ \frac{9}{a^2} - \frac{1}{b^2} = 1 \] ### Step 4: Substitute \( b^2 \) from equation (1) Now, we substitute \( b^2 = 2a^2 \) into the equation: \[ \frac{9}{a^2} - \frac{1}{2a^2} = 1 \] To combine the fractions, we find a common denominator: \[ \frac{18}{2a^2} - \frac{1}{2a^2} = 1 \] This gives: \[ \frac{17}{2a^2} = 1 \] ### Step 5: Solve for \( a^2 \) Cross-multiplying gives: \[ 17 = 2a^2 \implies a^2 = \frac{17}{2} \] ### Step 6: Find \( b^2 \) Using equation (1): \[ b^2 = 2a^2 = 2 \times \frac{17}{2} = 17 \] ### Step 7: Write the equation of the hyperbola Now we can substitute \( a^2 \) and \( b^2 \) back into the standard form of the hyperbola: \[ \frac{x^2}{\frac{17}{2}} - \frac{y^2}{17} = 1 \] Multiplying through by the least common multiple (LCM) of the denominators, which is \( 34 \): \[ 34 \left( \frac{x^2}{\frac{17}{2}} \right) - 34 \left( \frac{y^2}{17} \right) = 34 \] This simplifies to: \[ 4x^2 - 2y^2 = 34 \] Rearranging gives: \[ 4x^2 - 2y^2 - 34 = 0 \] ### Final Answer The equation of the hyperbola is: \[ 4x^2 - 2y^2 = 34 \]

To find the equation of the hyperbola whose axes are the coordinate axes, with a focus on the x-axis, passing through the point (-3, 1) and having an eccentricity of √3, we can follow these steps: ### Step 1: Write the standard form of the hyperbola The standard equation of a hyperbola with a horizontal transverse axis is given by: \[ \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 \] ...
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