Question

IIT QUESTION
PLZ TRY........
LET f(x) = lnx and g(x) be the inverse of the function f(f(x)).then the value of 3/e * g' (0)
is?
NOTE { g' means g differentiation}

Answer 1

f( f(x)) = ln( lnx)
x = ln( lny)

e^x = lny

e^x = 1/y y'

y' = e^x.y

g'(0)= e

SO 3/e. e
= 3