Find the eccentricity of the ellipse x²/289 + y²/64 = 1.

Answer and explanation

Correct answer: B.

  1. Step 1: Here a² = 289 and b² = 64, so c² = a² − b² = 225, c = 15. Step 2. e = c/a = 15/17. **Answer: . Why not the others:** is what you get if you use b/a. is what you get if you use c/b. is what you get if you give e².

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