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JEE Mains · Maths · STD 12 - 1. relation and function

माना \(f, g\) तथा \(h\) वास्तविक मान फलन है, जो \(\mathbb{R}\) पर इस प्रकार परिभाषित हैं   \(f(x)=\left\{\begin{array}{cc}\frac{x}{|x|}, & x \neq 0 \\ 1, & x=0\end{array}, g(x)=\left\{\begin{array}{cc}\frac{\sin (x+1)}{(x+1)}, & x \neq-1 \\ 1, & x=-1\end{array}\right.\right.\) \(\mathrm{h}(\mathrm{x})=2[\mathrm{x}]-\mathrm{f}(\mathrm{x})\), जहाँ \([\mathrm{x}]\) महत्तम पूर्णाक \(\leq \mathrm{x}\) है। तब, \(\lim _{\mathrm{x} \rightarrow 1} \mathrm{~g}(\mathrm{~h}(\mathrm{x}-1))\) का मान है

  1. A \(1\)
  2. B \(-1\)
  3. C \(-1\)
  4. D \(0\)
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Answer & Solution

Correct Answer

(A) \(1\)

Step-by-step Solution

Detailed explanation

\(LHL =\lim _{ k \rightarrow 0} g ( h (- k )) , k > 0\) \(=\lim _{ k \rightarrow 0} g (-2+1) \because f ( x )=-1 \forall x < 0\) \(= g (-1)=1\) \(RHL =\lim _{ k \rightarrow 0} g ( h ( k )) , k > 0\) \(=\lim _{ k \rightarrow 0} g (-1) , \because f ( x )=1, \forall x > 0\) \(=1\)
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