You are Here: Home >< Maths

# easy fractions question watch

1. I know I shouldn't have to ask this but its really confusing me.
Why can (e^-x)/(1-e^-x) be written as 1/((e^-x)-1)
can x/1-x always be written as 1/x-1 ? if so can someone provide a simple proof/explanation. cheers.
2. (Original post by Gibus_pyro)
I know I shouldn't have to ask this but its really confusing me.
Why can (e^-x)/(1-e^-x) be written as 1/((e^-x)-1)
can x/1-x always be written as 1/x-1 ? if so can someone provide a simple proof/explanation. cheers.
It can't. Evaluate both sides at to get LHS , RHS .
3. (Original post by Gibus_pyro)
I know I shouldn't have to ask this but its really confusing me.
Why can (e^-x)/(1-e^-x) be written as 1/((e^-x)-1)
can x/1-x always be written as 1/x-1 ? if so can someone provide a simple proof/explanation. cheers.
by multiplying top and bottom by
4. (Original post by Gibus_pyro)
can x/1-x always be written as 1/x-1 ? if so can someone provide a simple proof/explanation. cheers.
Are you suggesting that If so, no
5. (Original post by brianeverit)
by multiplying top and bottom by
thanks , that makes sense

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: December 3, 2014
Today on TSR

### University open days

• Southampton Solent University
Sun, 18 Nov '18
Wed, 21 Nov '18
• Buckinghamshire New University
Wed, 21 Nov '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams