Which one of the following is correct regarding \(\rm \lim_{x\rightarrow 3}\frac{|x-3|}{x-3}\)?

This question was previously asked in
NDA-II 2024 (Maths) Official Paper (Held On: 01 Sept, 2024)
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  1. Limit exists and is equal to 1 
  2. Limit exists and is equal to 0 
  3. Limit exists and is equal to -1 
  4. Limit does not exist  

Answer (Detailed Solution Below)

Option 4 : Limit does not exist  
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Explanation:

Given:

\(\rm \lim_{x\rightarrow 3}\frac{|x-3|}{x-3}\)

LHL = \(\rm \lim_{x\rightarrow 3}\frac{|x-3|}{x-3} = \frac{-(x-3)}{x-3} = -1\)

RHL = \(\rm \lim_{x\rightarrow 3}\frac{|x-3|}{x-3} = \frac{(x-3)}{x-3} =1\)

LHL ≠ RHL; limit does not exist

∴ Option (d) is correct.

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