89=15^x

Lösung

89 = 1 5^{x}

x = \frac{ln ( 89 )}{ln ( 15 )}

Dezimale

x = 1.65751 \dots

Schritte zur Lösung

89 = 1 5^{x}

Wende Exponentenregel an

ln (89) = x ln (15)

Löse

ln (89) = x ln (15) : x = \frac{ln ( 89 )}{ln ( 15 )}

x = \frac{ln ( 89 )}{ln ( 15 )}

3^{x - 1} = 20

3^{x - 4} = 2

6 4^{x} = 256

e^{x} = 0.6

13 (1 + e^{- x})^{- 1} = 2