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Log proof help watch

1. Hi,
How do you do this question?:

Given that a>0, b>0, prove that ln(ab) = lna + lnb
2. You have got to know your log laws to answer all logs questions.

Log(a) + Log(b) is identical to Log(ab)
Log(a) - Log9b) is identical to Log(a/b)
3. (Original post by Earl_Earl)
You have got to know your log laws to answer all logs questions.

Log(a) + Log(b) is identical to Log(ab)
Log(a) - Log9b) is identical to Log(a/b)
Thanks for your reply yes I know that, but do you know how you prove it?
4. (Original post by Phoebus Apollo)
Hi,
How do you do this question?:

Given that a>0, b>0, prove that ln(ab) = lna + lnb
urm might be wrong yolo

if you let

&

In terms of e, this would give:

5. (Original post by Naruke)
urm might be wrong yolo

if you let

&

In terms of e, this would give:

Thanks, Naruke
6. (Original post by Phoebus Apollo)
Thanks, Naruke
No problemo

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