एक फलन निम्नानुसार निर्धारित है:

उपर्युक्त फलन के संदर्भ में निम्नलिखित में से कौन-सा सही है?

This question was previously asked in
NDA (Held On: 10 Sept 2017) Maths Previous Year paper
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  1. f(x), x = 0 पर संतत है किन्तु x = 0 पर अवकलनीय नहीं है
  2. f(x) पर संतत होने के साथ-साथ अवकलनीय भी है। 
  3. f(x), x = 0 पर असंतत है। 
  4. उपर्युक्त में से कोई नहीं 

Answer (Detailed Solution Below)

Option 3 : f(x), x = 0 पर असंतत है। 
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Detailed Solution

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संकल्पना:

  • हम जानते हैं कि f(x), x = c पर निरंतर है यदि 

LHL = RHL = f(c) का मान अर्थात् 

 

गणना:

दिया गया है:  

                      (∵ |x| = -x, यदि x < 0है।)

                    (∵ |x| = x, यदि  x > 0 है।)

यहाँ, LHL ≠ RHL, इसलिए f(x) अनिरंतर है। 

अतः विकल्प (3) सही है। 

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