## needhelp 5 years ago for the log quetsion. ln 1= 0 <-in this case, do i need to assume e is there? i can't remember the formulas, is there any way i can remember it?

1. anonymous

ln 1 means to what power must you raise e to get 1.

2. anonymous

does that make sense?

3. NeedHelp

yea, I guess i am misunderstanding form of questions. can you help me out with more please?

4. anonymous

what are you having difficulty with?

5. NeedHelp

ln e = 1. i am confuse with the formulas

6. NeedHelp

what is the 1 stands for? is power?

7. anonymous

yes, in that case it is the power of e.

8. anonymous

i.e. ln e ^10 = 10.

9. anonymous

ln and e are inverses of each other.

10. anonymous

does that make sense?

11. NeedHelp

yea, so that means above that example i show, ln e^1, is this right?

12. anonymous

for ln e = 1 is just saying that the log of the base itself, which is e, is 1.

13. anonymous

Exponential to Logarithmic: $b^{x} = a$ I use b because b is the Base. B is for Base. $\log_{b} (a) = x$ Fill in the blanks to change it to logarithmic using the numbers from the exponential form. Always remember, A Log Is an Exponent. A log with Base "e" is a special log which isnt written as $\log_{e} a$ , but rather it is written as $\ln a$

14. NeedHelp

so in this case, In a, means log a without the base?

15. anonymous

$\ln a$ means $\log_{e} a$ , but it just is written as $\ln a$

16. NeedHelp

so for example, if ln 9, what is the answer going to be?

17. anonymous

Therefore when you have ln e = 1 you actually have: $\log_{e} e = 1$ Which, if you convert it back to exponential form, you get: $e ^{1} = e$

18. anonymous

ln 9 = $\log_{e} 9$ which can convert to $e ^{x} = 9$

19. NeedHelp

for the exponent, is it possible to become a # instead of x ?

20. anonymous

ln 1=0 1 = e^0