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Vilka [71]
3 years ago
13

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

Mathematics
1 answer:
Leni [432]3 years ago
3 0

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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