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

परवलय \(\mathrm{ax}^2+2 \mathrm{bx}+\mathrm{cy}=0\) व \(\mathrm{dx}^2+2 \mathrm{ex}+\mathrm{fy}=0\) रेखा \(\mathrm{y}=1\) पर मिलते है। यदि \(\mathrm{a}, \mathrm{b}, \mathrm{c}, \mathrm{d}, \mathrm{e}, \mathrm{f}\) धनात्मक वास्तविक संख्याऐं है और \(a, b, c\) \(G.P.\) में है, तब

  1. A \(d, e, f \) \(A.P.\) में है
  2. B \(\frac{ d }{ a }, \frac{ e }{ b }, \frac{ f }{ c }\) \(G.P.\) में है
  3. C \(\frac{ d }{ a }, \frac{ e }{ b }, \frac{ f }{ c }\) \(A.P.\) में है
  4. D \(d, e, f\)  \(G.P. \) में है
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Answer & Solution

Correct Answer

(C) \(\frac{ d }{ a }, \frac{ e }{ b }, \frac{ f }{ c }\) \(A.P.\) में है

Step-by-step Solution

Detailed explanation

\(a x^2+2 b x+c=0\) \(\Rightarrow ax ^2+2 \sqrt{ ac } c + c =0\left(\because b ^2= ac \right)\) \(\Rightarrow( x \sqrt{ a }+\sqrt{ c })^2=0\) \(x^2-\frac{\sqrt{c}}{\sqrt{a}}\) Now, \(dx ^2+2 ex + f =0\)…
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