annafhobbins
annafhobbins
25-01-2020
Mathematics
contestada
e^2x + 3e^x - 18 = 0
Respuesta :
divinedivena
divinedivena
25-01-2020
Let e^x = a
a^2 + 3a - 18 = 0
(a - 3)(a + 6) = 0
a = 3, -6
e^x = 3, -6 (rejected as -6 <0)
x = ln3
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