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JEE Mains · Maths · STD 12 - 6. Application of derivatives

माना \(a\) एक पूर्णांक है जिसके लिए बहुपद \(2 x ^{5}+5 x ^{4}+10 x ^{3}+10 x ^{2}+10 x +10\) के सभी वास्तविक मूल अन्तराल \((a, a+1)\) में है। तो \(|a|\) बराबर है

  1. A \(1\)
  2. B \(2\)
  3. C \(4\)
  4. D \(3\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(2\)

Step-by-step Solution

Detailed explanation

Let \(2 x^{5}+5 x^{4}+10 x^{3}+10 x^{2}+10 x+10=f(x)\) Now \(f(-2)=-34\) and \(f(-1)=3\) Hence \(f(x)\) has a root in \((-2,-1)\) Further \(f^{\prime}(x)=10 x^{4}+20 x^{3}+20 x^{2}+20 x+10\)…
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