# Homework Help: Make F the sunject of the formula

1. Feb 26, 2010

### Gringo123

This one is really hard. I have no idea even how to start. Can anyone explain how it's done?
I need to make F the subject of the formula.

1/F = 1/U + 1/V

Thanks

2. Feb 26, 2010

### Mentallic

Do you know how to manipulate $$\frac{1}{U}+\frac{1}{V}$$ into a single fraction?

3. Feb 26, 2010

### Bohrok

If making F the subject is all you have to do without any simplifying, the easy way would be to take the reciprocal of both sides. Or you can use some algebra and first multiply both sides by F so you don't have F in a denominator