# Need something solving PROBLEM AHOY!

1. Jul 4, 2010

### SolStis

Need something solving!!!! PROBLEM AHOY!

Hi there,

Im in dire need of a problem solving because i really cba to do it at this time of nite and need sorting by 2moz morning.... putting my faith in PF here... I dont think its too diff I just havnt done any algebra for a while and need some assistance.

Need this rearranging for Z:

1=-((e^ZL)+(e^Zw))

Any help much appreciated!!!!

Regards

Sol

2. Jul 4, 2010

### mathman

Re: Need something solving!!!! PROBLEM AHOY!

If L and w are arbitrary (assuming multiplying Z in the exponents) there is no closed form solution for Z.

3. Jul 5, 2010

### SolStis

Re: Need something solving!!!! PROBLEM AHOY!

ok mate, well is there any way i can find it if L and W arnt arbitrary?

4. Jul 5, 2010

### The Chaz

Re: Need something solving!!!! PROBLEM AHOY!

In real numbers, the problem is immediate: no linear combination of powers of e will ever equal -1.

In complex numbers, L = W would make things a lot simpler, but that's trivial...

5. Jul 5, 2010

### SolStis

Re: Need something solving!!!! PROBLEM AHOY!

Ok, well in this instance i need it solving for w = 24 and L = 3500, but i would like a general solution so i can apply any values for L and w

6. Jul 5, 2010

### The Chaz

Last edited by a moderator: Apr 25, 2017