展开 (3n+5)/(n(n-1)(n-2))

解答

展开

\frac{3 n + 5}{n ( n - 1 ) ( n - 2 )}

\frac{3 n + 5}{n ^{3} - 3 n ^{2} + 2 n}

求解步骤

\frac{3 n + 5}{n ( n - 1 ) ( n - 2 )}

乘开

n (n - 1) (n - 2) : n^{3} - 3 n^{2} + 2 n

= \frac{3 n + 5}{n ^{3} - 3 n ^{2} + 2 n}

e x p an d \frac{( x + 1 ) ^{2}}{( x - 1 ) ( x - 3 )}

e x p an d \frac{40}{( z ^{2} + 16 ) z ^{2}}

e x p an d \frac{1 - 3 x ^{2}}{( 1 - x ^{2} ) ^{2}}

e x p an d \frac{2 ( 4 a + 4 )}{a + 9}

e x p an d \frac{x ( x - 8 )}{2}