Find an equation of the hyperbola that has foci at (-13,0) and (13,0) , and asymptotes y=3/2x and y=-3/2x.
Question
Find an equation of the hyperbola that has foci at (-13,0) and (13,0) , and asymptotes y=3/2x and y=-3/2x.
Solution
To find the equation of the hyperbola with the given foci and asymptotes, we can follow these steps:
Step 1: Determine the center of the hyperbola. Since the foci are located at (-13, 0) and (13, 0), the center of the hyperbola is the midpoint between the foci. Using the midpoint formula, we can find the center: Center = ((-13 + 13)/2, (0 + 0)/2) = (0, 0)
Step 2: Find the distance between the center and one of the foci. The distance between the center and a focus is called the distance "c". In this case, c = 13.
Step 3: Find the distance between the center and one of the vertices. The distance between the center and a vertex is called the distance "a". Since the asymptotes have slopes of 3/2 and -3/2, the distance between the center and a vertex is given by a = c/sqrt(m^2 + 1), where m is the slope of the asymptote. In this case, m = 3/2, so a = 13/sqrt((3/2)^2 + 1) = 13/sqrt(9/4 + 1) = 13/sqrt(13/4) = 13/(sqrt(13)/2) = 26/sqrt(13).
Step 4: Determine the value of "b". The value of "b" can be found using the equation of a hyperbola: a^2 + b^2 = c^2. Plugging in the values we found, we have: (26/sqrt(13))^2 + b^2 = 13^2 676/13 + b^2 = 169 b^2 = 169 - 676/13 b^2 = (169*13 - 676)/13 b^2 = 2197/13 - 676/13 b^2 = 1521/13 b = sqrt(1521/13) b = sqrt(117)
Step 5: Write the equation of the hyperbola. Using the information we found, the equation of the hyperbola with foci at (-13, 0) and (13, 0), and asymptotes y = 3/2x and y = -3/2x, is: (x - 0)^2/(26/sqrt(13))^2 - (y - 0)^2/(sqrt(117))^2 = 1
Therefore, the equation of the hyperbola is: x^2/(26/sqrt(13))^2 - y^2/(sqrt(117))^2 = 1
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