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फलन f(x) = | x – 2 | + 2| x – 3 | की अन्तराल [1, 3] में अवकलनीयता की जाँच कीजिए।

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दिए गए फलन को निम्न प्रकार लिख सकते हैं

यहाँ x = 2 पर अवकलनीय की जाँच करेंगे; क्योंकि 2 ∈ [1, 3]

x = 2 पर बाय सीमा (Left hand limit)

x = 2 पर दायीं सीमा (Right hand limit)

अत: फलन x = 2 पर अवकलनीय नहीं है। स्पष्ट है कि फलन अन्तराल [1, 3] में अवकलनीय नहीं है।

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