Homework Help: Calculus Prob.

1. Mar 28, 2008

osqen

1. The problem statement, all variables and given/known data

e^(0,001*a)-((R^2)*(e^(-0,001*a)))

R and a is constant

i cant take ln of this function, pls help

2. Mar 28, 2008

nicksauce

you can write R^2e^(-0.001a) as e^(ln(R^2)*-0.001a)
can you take it from there?

3. Mar 29, 2008

sutupidmath

What exactly is your question? I don't see anythig being asked here.

4. Mar 29, 2008

osqen

my question is x = e^(0,001*a)-((R^2)*(e^(-0,001*a)))

and lnx = ?

5. Mar 29, 2008

Tom Mattson

Staff Emeritus
I still don't understand what the problem here is. If $x=\exp(0.001a)-R^2\exp(-0.001a)$, then obviously:

$\ln(x)=\ln(\exp(0.001a)-R^2\exp(-0.001a))$.

Am I missing something?

6. Mar 29, 2008

osqen

i lost my ability :( thank you:)

7. Mar 29, 2008

HallsofIvy

If you were wondering if it could be simplified at all, the answer is "no".

8. Mar 29, 2008

osqen

is it the eqn. as simple as it can be