展开 ((n+1)^3!)/((n!)^3)

解答

展开

\frac{( n + 1 ) ^{3} !}{( n ! ) ^{3}}

\frac{( n ^{3} + 3 n ^{2} + 3 n + 1 ) !}{n ! ^{3}}

求解步骤

\frac{( n + 1 ) ^{3} !}{n ! ^{3}}

(n + 1)^{3} = n^{3} + 3 n^{2} + 3 n + 1

= \frac{( n ^{3} + 3 n ^{2} + 3 n + 1 ) !}{n ! ^{3}}

e x p an d (e + d)^{2} - 18 (e + d) + 65

e x p an d 9 x - (2 x - 15 = 42)

e x p an d (y, x) - (x + 3 y - 5)

e x p an d \frac{s + 1}{( s - 2 ) ( s + 2 )}

e x p an d 2 (\frac{π}{24} - \frac{1}{36})