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JEE Mains · Maths · STD 11 - 10.2 parabola,ellipse,hyperbola

જો ઉપવલય \(\frac{x^2}{9}+\frac{y^2}{4}=1\) ની જીવાના મધ્યબિંદુ \((\sqrt{2}, 4 / 3)\) હોય અને જીવાની લંબાઈ \(\frac{2 \sqrt{\alpha}}{3}\) હોય, તો \(\alpha\):

  1. A \(20\)
  2. B \(22\)
  3. C \(18\)
  4. D \(26\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(22\)

Step-by-step Solution

Detailed explanation

\begin{aligned} & E: \frac{x^2}{9}+\frac{y^2}{4}=1 \\ & T=S_1 \\ & \Rightarrow \frac{\sqrt{2} x}{9}+\frac{1}{4}\left(\frac{4}{3} y\right)-1=\frac{2}{9}+\frac{16}{9(4)}-1 \\ & \frac{\sqrt{2} x}{9}+\frac{y}{3}=\frac{2}{9}+\frac{4}{9} \\ & \frac{\sqrt{2}…

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