If is a differentiable function in the interval (0, ∞) such that = 1 and for each , then is equal to :
As we learnt in
L - Hospital Rule -
- wherein
Now, let y=f(x)
If
Put, x=1, y=1
Put,
Option 1)
This option is incorrect.
Option 2)
This option is incorrect.
Option 3)
This option is incorrect.
Option 4)
This option is correct.
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