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

यदि अनुक्रम \(-16,8,-4,2, \ldots\) के \(p\) तथा \(q\) पदों के समांतर माध्य तथा गुणोत्तर माध्य, समीकरण \(4 x ^{2}-9 x +5=0\) को सन्तुष्ट करते हैं, तो \(p + q\) बराबर है .......... |

  1. A \(16\)
  2. B \(8\)
  3. C \(10\)
  4. D \(12\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(10\)

Step-by-step Solution

Detailed explanation

\(4 x^{2}-9 x+5=0 \Rightarrow x=1, \frac{5}{4}\) Now given \(\frac{5}{4}=\frac{ t _{ p }+ t _{ q }}{2}, t = t _{ p } t _{ q }\) where \(t _{ r }=-16\left(-\frac{1}{2}\right)^{ r -1}\) so…
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