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

फलन \(f(x)=(x-2)^{2 / 3}(2 x+1)\) के क्रांतिक बिंदुओं की संख्या ........... है।

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

Answer & Solution

Correct Answer

(A) \(2\)

Step-by-step Solution

Detailed explanation

\( f(x)=(x-2)^{2 / 3}(2 x+1) \) \( f^{\prime}(x)=\frac{2}{3}(x-2)^{-1 / 3}(2 x+1)+(x-2)^{2 / 3} \) \( f^{\prime}(x)=2 \times \frac{(2 x+1)+(x-2)}{3(x-2)^{1 / 3}} \) \( \frac{3 x-1}{(x-2)^{1 / 3}}=0\) Critical points \(\mathrm{x}=\frac{1}{3}\) and \(\mathrm{x}=2\)
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