Home › AP EAPCET (Engineering) › Mathematics › Coordinate Geometry: Ellipse › To read off a and b from 9x² + 16y² = 144, divid…
To read off a and b from 9x² + 16y² = 144, divide both sides by
A9
B16
C25
D144
Answer & Solution
Correct answer: D. 144
Division by 144 turns the right side into 1, giving x²/16 + y²/9 = 1.
Related questions
The ellipse x²/a² + y²/b² = 1 becomes a circle when:x²/(k-2) + y²/(5-k) = 1 is an ellipse for:A point of an ellipse with e = 1/2 is 8 units from a directrix. Focal distance:With semi-major axis 10 and e = 0.6, the distance between foci is:An ellipse with a = 4 and e = 1/2 has a latus rectum of length:Line y = x + k touches x²/9 + y²/4 = 1. Possible k:P lies on x²/81 + y²/45 = 1. Its focal distances add to:Centred at origin, an ellipse cuts the axes at (±6, 0) and (0, ±3). Equation: