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

समीकरण \(x ^4-4 x +1=0\) के भिन्न वास्तविक मूलों की संख्या होगी।

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

Answer & Solution

Correct Answer

(D) \(2\)

Step-by-step Solution

Detailed explanation

Let \(f(x)=x^{4}-4 x+1\) \(f^{\prime}(x)=4 x^{3}-4\) \(f^{\prime}(x)=0 \Rightarrow x=1\) \(x=1\) is point of minima. \(f(1)=-2\) \(f(0)=1\)
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