((x+2)!)/(x!)=0

解答

\frac{( x + 2 ) !}{x !} = 0

x = - 2, x = - 1

求解步骤

\frac{( x + 2 ) !}{x !} = 0

化简

\frac{( x + 2 ) !}{x !} : (x + 2) (x + 1)

(x + 2) (x + 1) = 0

解

(x + 2) (x + 1) = 0 : x = - 2, x = - 1

x = - 2, x = - 1

5 x^{- 2} - 19 x^{- 1} - 4 = 0

\frac{x}{x + 6} = \frac{9}{8}

- \frac{7}{x + 7} + 6 = \frac{x}{x + 7}

\frac{k p}{1 + k p} = 0.99

4 x = \frac{4}{x}