मान लीजिए सभी x के लिए फलन f(x) = xn, n ≠ 0 अवकलनीय है। तो n निम्न में से किस अंतराल का कोई भी तत्व हो सकता है?

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  1. [1, ∞)
  2. (0, ∞)
  3. \(\left( {\frac{1}{2},{\rm{\;}}\infty } \right)\)
  4. उपरोक्त में से कोई नहीं 

Answer (Detailed Solution Below)

Option 1 : [1, ∞)
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गणना:

दिया गया है: f(x) = xn, n ≠ 0.

F’(x) = nxn – 1

f(x) के अवकलनीय होने के लिए, n – 1 ≥ 0

अतः  n ≥ 1.

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