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# What does In x mean? (C3) Watch

1. My maths teacher set us homework on mymaths and for the first part, we have to rearrange the equations into the form f(x)=0.
One of the equations is In 2x = 3. I have never came across 'In' before, although I have seen it on calculators. How do you put this equation in the form f(x) = 0 and what on Earth is In and what are you supposed to do with it?
2. .
The natural logarithm.
You do not put it in f(x)=0 form.
It's by definition. If .
3. ln is log base e. So similar if it was log base 10 on the left you'd make the right log10^3 and then remove logs from both sides.

So ln2x=3
ln2x=lne^3
2x=e^3
x=1/2(e^3)
4. (Original post by jessyjellytot14)
My maths teacher set us homework on mymaths and for the first part, we have to rearrange the equations into the form f(x)=0.
One of the equations is In 2x = 3. I have never came across 'In' before, although I have seen it on calculators. How do you put this equation in the form f(x) = 0 and what on Earth is In and what are you supposed to do with it?
If you just want to put it into the form f(x) = 0, then surely all you have to do is write

ln(2x) - 3 = 0

No?
5. It means L times by N times by 2x.
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