उन सभी बिन्दुओं का समुच्चय, जहाँ फलन अवकलनीय है, कौन-सा है?

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NDA (Held On: 10 Sept 2017) Maths Previous Year paper
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  1. (0, ∞)
  2. (-∞, ∞) 
  3. (-∞, 0) ∪ (0, ∞) 
  4. (-1, ∞)

Answer (Detailed Solution Below)

Option 3 : (-∞, 0) ∪ (0, ∞) 
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NDA 01/2025: English Subject Test
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Detailed Solution

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संकल्पना:

  • एक फलन को उस बिंदु पर तब अवकलनीय कहा जाता है जब वहां उस बिंदु पर एक परिभाषित अवकलज होता है। 
  • हर शून्य नहीं होना चाहिए। 
  • श्रृंखला नियम:

 

गणना:

दिया गया है:

      

अब, x = 0 पर, f’(x) = 0/0

इसलिए, x = 0 पर छोड़कर f’(x), x के सभी मानों के लिए परिभाषित है। 

⇒ f(x), (-∞, 0) ∪ (0, ∞) पर अवकलनीय है। 

अतः विकल्प (3) सही है। 

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