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JEE Mains · Maths · STD 11 - 4.2 Quadratic equations and inequations

સમીકરણ \(\log _{(x+3)}\left(6 x^2+28 x+30\right)=5-2 \log _{(6 x+10)}\left(x^2+6 x+9\right)\) ના તમામ વાસ્તવિક બીજનો સરવાળો ___ છે.

  1. A 2
  2. B 1
  3. C 0
  4. D 4
Verified Solution

Answer & Solution

Correct Answer

(C) 0

Step-by-step Solution

Detailed explanation

\( log_{x+3}[(x+3)(6x+10)]=5-2log_{6x+10}(x+3)^{2} \) \( 1+log_{x+3}(6x+10)=5-4~log_{6x+10}(x+3) \) Let \( log_{(x+3)}(6x+10)=A \) \( \Rightarrow A+\frac{4}{A}=4 \) or \( A=2 \) \(\Rightarrow \log _{(x+3)}(6 x +10)=2\) \(\Rightarrow 6 x+10=(x+3)^2\)…
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