Untersuchungen Über die Reihe: 1 + (M/1)x + M·(m 1)/(1·2)·x²+ M·(m 1)·(m 2)/(1·2·3)·x³+ (Classic Reprint): 1 + (M/1)X + M-(M 1)/(1-2)-X²+ M-(M 1)-(M 2)/(1-2-3)-X3+ (Classic Reprint)