from math import exp
def f(x):
  return(x/(exp(x)-x))
def aireinf(N):
  A=0
  x=0
  h=1/N
  for i in range (1,N+1):
    A=A+h*f(x)
    x=x+h
  return(A)
  
def EncadrAire(N):
  A=0
  B=0
  x=0
  h=1/N
  for i in range (1,N+1):
    A=A+h*f(x)
    x=x+h
    B=B+h*f(x)
  return(A,B)