def form(s, c):
    return ((np.log((1 + (c * s))) - ((c * s) / (1 + (c * s)))) / (np.log((1 + c)) - (c / (1 + c))))
def form(s, c):
    return ((np.log((1 + (c * s))) - ((c * s) / (1 + (c * s)))) / (np.log((1 + c)) - (c / (1 + c))))