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# C3 ALL natural logs and exponential rules required! watch

1. Hi there,

I am currently revising C3 and one thing I continuously get confused with is ln's and e's and all the general rules and rules for intergration and differentiation

I was wondering if anyone could write a list of all the rules, I will list the ones I know for example:

alnb = ln(b^a)

dy/dx of ln1 = 1/x

dy/dx of e^-x = -e^-x
2. ln(a)-ln(b)=ln(a/b)
ln(a)+ln(b)=ln(a*b)
3. (Original post by The0neAnd0nly)
Hi there,

I am currently revising C3 and one thing I continuously get confused with is ln's and e's and all the general rules and rules for intergration and differentiation

I was wondering if anyone could write a list of all the rules, I will list the ones I know for example:

alnb = ln(b^a)

dy/dx of ln1 = 1/x

dy/dx of e^-x = -e^-x
The second rule you know - probably just a typing error but since ln1 = 0 what I think you meant was

I'm sure you knew that, just best to be safe

by the chain rule. A more general formula for the third thing you said you knew.

Surely there's a list in the text book?
4. Thanks guys and those tables are extremely helpful!

@Theirattional yes I did mean lnx differentiates to 1/x, my mistake.

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