Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A
B
C
Zero
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
A
= 
= 
= 
= 
Trick : Applying ‘L’ Hospital’s rule, [Differentiating N r and D r with respect to h]
We get, 
.
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