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JEE Mains · Maths · STD 11 - 8. sequence and series

यदि फलन \(f(\theta)=\frac{\sin ^4 \theta+3 \cos ^2 \theta}{\sin ^4 \theta+\cos ^2 \theta}, \theta \in \mathbb{R}\) का परिसर \([\alpha, \beta]\) है, तो उस अनंत G.P. का योग, जिसका प्रथम पद \(64\) है और सार्व अनुपात \(\frac{\alpha}{\beta}\) है, वह ........... बराबर है।

  1. A \(96\)
  2. B \(46\)
  3. C \(27\)
  4. D \(52\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(46\)

Step-by-step Solution

Detailed explanation

\( f(\theta)=\frac{\sin ^4 \theta+3 \cos ^2 \theta}{\sin ^4 \theta+\cos ^2 \theta} \) \( f(\theta)=1+\frac{2 \cos ^2 \theta}{\sin ^4 \theta+\cos ^2 \theta} \) \( f(\theta)=\frac{2 \cos ^2 \theta}{\cos ^4 \theta-\cos ^2 \theta+1}+1 \)…
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