Q. Write an equation for an ellipse centered at the origin, which has foci at (0,±55) and vertices at (0,±89).
Ellipse Orientation: We have:Foci: (0,±55)Vertices: (0,±89)Since the foci and vertices are on the y-axis, the ellipse is vertical.
Finding the Value of c: Identify the value of c (the distance from the center to a focus) using the coordinates of the foci.c=55
Finding the Value of a: Identify the value of a (the distance from the center to a vertex) using the coordinates of the vertices.a=89
Finding the Value of b: Use the relationship c2=a2−b2 to find the value of b2 (the square of the distance from the center to a co-vertex).c2=a2−b2(55)2=(89)2−b255=89−b2b2=89−55b2=34
Standard Form of the Equation: Now we have:a=89b=34c=55The standard form of the equation for a vertical ellipse centered at the origin is:(x−h)2/b2+(y−k)2/a2=1Since the center (h,k) is at the origin (0,0), the equation simplifies to:x2/b2+y2/a2=1
Substituting Values into the Equation: Substitute the values of a and b into the equation.(34)2x2+(89)2y2=134x2+89y2=1
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