What is the length of the latus rectum of the ellipse x^2/36 + y^2/16 = 1?

Practice Questions

Q1
What is the length of the latus rectum of the ellipse x^2/36 + y^2/16 = 1?
  1. 8/3
  2. 12
  3. 16/3
  4. 24

Questions & Step-by-Step Solutions

What is the length of the latus rectum of the ellipse x^2/36 + y^2/16 = 1?
  • Step 1: Identify the equation of the ellipse, which is given as x^2/36 + y^2/16 = 1.
  • Step 2: Recognize that in the standard form of an ellipse, a^2 is the denominator of the x^2 term and b^2 is the denominator of the y^2 term.
  • Step 3: From the equation, we see that a^2 = 36 and b^2 = 16.
  • Step 4: Calculate the values of a and b by taking the square roots: a = sqrt(36) = 6 and b = sqrt(16) = 4.
  • Step 5: Use the formula for the length of the latus rectum, which is (2b^2/a).
  • Step 6: Substitute the values of b^2 and a into the formula: b^2 = 16 and a = 6.
  • Step 7: Calculate the length of the latus rectum: (2 * 16) / 6 = 32 / 6 = 12/3 = 4.
  • Step 8: Therefore, the length of the latus rectum is 12.
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