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AP EAMCET · Maths · Limits

\(\lim _{x \rightarrow 2} \frac{\sqrt{1+4 x}-\sqrt{3+3 x}}{x^3-8}=\)

  1. A \(\frac{1}{72}\)
  2. B \(\frac{1}{36}\)
  3. C \(\frac{1}{24}\)
  4. D \(\frac{1}{12}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\frac{1}{72}\)

Step-by-step Solution

Detailed explanation

\(\lim _{x \rightarrow 2} \frac{\sqrt{1+4 x}-\sqrt{3+3 x}}{x^3-8}\left(\frac{0}{0}\right.\) form \()\) \(=\lim _{x \rightarrow 2} \frac{\frac{4}{2 \sqrt{1+4 x}}-\frac{3}{2 \sqrt{3+3 x}}}{3 x^2}=\frac{\frac{4}{6}-\frac{3}{6}}{12}=\frac{1}{72}\)
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