((n+2)!)/(n!)=12

Lösung

\frac{( n + 2 ) !}{n !} = 12

n = 2, n = - 5

Schritte zur Lösung

\frac{( n + 2 ) !}{n !} = 12

Vereinfache

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

(n + 2) (n + 1) = 12

Löse

(n + 2) (n + 1) = 12 : n = 2, n = - 5

n = 2, n = - 5

\frac{6}{x + 3} + \frac{2}{x + 1} = 1

1 - \frac{100}{x ^{2}} = 0

\frac{x + 6}{x - 6} = - \frac{4}{x}

x^{- 4} = 81

ln (1 0^{5}) = - (\frac{1.2}{d})