Ex 11.2, 6 - x2 = -9y, find focus, axis, directrix, latus - Ex 11.2

  1. Chapter 11 Class 11 Conic Sections
  2. Serial order wise
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Ex 11.2, 6 Find the coordinates of the focus, axis of the parabola, the equation of directrix and the length of the latus rectum for x2 = –9y Given equation is x2 = –9y. Since the above equation is involves x2 Its axis is y-axis Also coefficient of y is negative (−) Hence we use equation x2 = − 4ay Latus Rectum is 4a = 4 × ﷐9﷮4﷯ = 9

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