Lnx-ln5=10?

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Answer 1 · 2018-02-13T14:46:44

$x =50$

We have:

$ln x -ln 5 = ln 10$

Using the result lnA=lnB=ln(A/B)# we can write:

$ln(x/5) = ln10$

The logarithm is a $1:1$ function so:

$ln A= ln B iff A=B$

And so we have:

$x/5 = 10 => x =50$