Log laws (1 Viewer)

[BlueGas]

If logea - logeb = loge(a/b), why isn't loge12 - loge4 the same value on the calculator as loge(12/4)?

 

[Drsoccerball]

If logea - logeb = loge(a/b), why isn't loge12 - loge4 the same value on the calculator as loge(12/4)?

It is the same value...

 

[Flop21]

It is the same value...

If so, maybe OP is using the 'log' button on the calculator. You need to use "ln" with logs involving "e" as their base. 'log' button is only for logs with 10 as their base.

 

[Ekman]

If so, maybe OP is using the 'log' button on the calculator. You need to use "ln" with logs involving "e" as their base. 'log' button is only for logs with 10 as their base.

That wouldn't make a difference, because it doesn't really matter what the base is, the log rule as the OP stated still applies no matter the base is

 

[psyc1011]

That wouldn't make a difference, because it doesn't really matter what the base is, the log rule as the OP stated still applies no matter the base is

OP could have done log(12) - log(4) = ln(3) on the calc

 

[BlueGas]

I don't know how I got different values... oh well, problem solved haha

 

[InteGrand]

I don't know how I got different values... oh well, problem solved haha

Lol how is it problem solved if you didn't manage to find out why you were getting different values? Or did you manage to find out? Was it just a calculator typo? What were the values you were getting? Maybe we can deduce what you were typing in to get those values.

 

[Flop21]

It was probably just a silly mistake / calculator typo. I've done that many times where I get the wrong answer after putting it in the calculator, ask here, then can't figure out how I was getting the wrong answer in the first place lol.

 

[BlueGas]

Lol how is it problem solved if you didn't manage to find out why you were getting different values? Or did you manage to find out? Was it just a calculator typo? What were the values you were getting? Maybe we can deduce what you were typing in to get those values.

I probably done a mistake while entering the numbers onto the calculator, I honestly don't remember how I was getting different values though, if I come across the same problem again I'll see what I'm doing wrong.