aliwatson102 aliwatson102
  • 25-11-2019
  • Mathematics
contestada

ln x + ln (x + 1) = ln 56

Respuesta :

maizetycorn
maizetycorn maizetycorn
  • 25-11-2019

Answer:

x=7

Step-by-step explanation:

ln x +ln(x+1)=ln 56

ln x(x+1)=ln 56

so x(x+1)=56

x^2+x-56=0

(x+8)(x-7)=0

x= -8 or x=7

and lnx,x>0

so x=7

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