Post a New Question

Algebra

posted by on .

how would you solve these two equations.

ln x + ln(x+1)=1

ln(x+5) = ln(x-1) - ln(x+1)

  • Algebra - ,

    put to work the properties of logs.

    ln x + ln(x+1) = 1
    ln(x(x+1)) = 1
    x(x+1) = e
    x^2 + x - e = 0
    then use the quadratic formula

    ln(x+5) = ln(x-1)/ln(x+1)
    ln(x+5) = ln((x-1)/(x+1))
    x+5 = (x-1)/(x+1)
    x^2+6x+5 = x-1
    x^2+5x+6 = 0
    ...

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question