def serie1(x, epsilon):
    t = 1
    suma = 0
    while abs(t)>= epsilon:
        suma = suma + t
        t = t * x
    return suma

def serie2(x, epsilon):
    t = x
    signe = 1
    suma = 0
    n = 1
    while abs(t)>= epsilon:
        suma = suma + t
        signe = -signe
        n = n +2
        t = signe * x**n/n
    return suma