展开 ((2(n+1))!)/(2^{n+1)(n+1)!(n+1)}

解答

展开

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

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

求解步骤

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

乘开

2^{n + 1} (n + 1)! (n + 1) : 2^{n + 1} n (n + 1)! + 2^{n + 1} (n + 1)!

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

乘开

2 (n + 1) : 2 n + 2

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

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

e x p an d \frac{20 ( 249 - 2 )}{49}

e x p an d (x^{3} - 4 x^{2} + x - 4) (x^{2} = 18 x + 82)

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

e x p an d x^{3} + 10 x^{2} + 23 x^{1} + 14