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in Continuity and Differentiability by (40.4k points)
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फलन f(x) = |x – 1| + |x – 2| के अन्तराल [0, 2] में अवकलनीयता का परीक्षण कीजिए।

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दिए गए फलन को निम्न प्रकार भी लिख सकते हैं,

यहाँ फलन की अवकलनीयता की जाँच बिन्दु x = 1 पर करेंगे। क्योंकि 1 ∈ [0, 2]

x = 1 पर अवकलनीयता के लिए।

बाएँ पक्ष का अवकलज (Left hand derivative)
L.H.D.

दाएँ पक्ष का अवकलज (Right hand derivative)
R.H.D.

फलन f(x), x = 1 पर अवकलनीय नहीं है तथा x = [0, 2]
अत: दिया हुआ फलन अन्तराल [0, 2] में अवकलनीय नहीं है।

इति सिद्धम्।

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