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limit x tends to zero f(x) + log(1- 1/e^f(x) - log(f(x)) =0 find f(0)

limit x tends to zero  f(x) + log(1- 1/e^f(x) - log(f(x)) =0


find f(0)

Grade:11

1 Answers

bharat bajaj IIT Delhi
askIITians Faculty 122 Points
9 years ago
\lim_{x\rightarrow 0}f(x) + log( 1 - \frac{1}{e^{f(x)}} - log f(x) = 0
f(0) + log( 1 - \frac{1}{e^{f(0)}} - log f(0) = 0
-f(0) = log( 1 - \frac{1}{e^{f(0)}} - log f(0)
Say f(0) = t
e^{-t} = 1 - \frac{1}{e^{t}} - log t
e^{-t} = 1 - e^{-t} - log t
2 e^{-t} = 1 - log t
This equation cant be solved using normal methods. Hence, if it is an objective question, you have to put values in it to get the answer. Maybe the question is wrong too.
Thanks & Regards
Bharat Bajaj
askiitian faculty
IIT Delhi

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