Thread: Another conics. Sorry I'm terrible at this stuff :(

Find an equation for the central hyperbola with one focus at (4,0), directrix at x=1 and eccentricity 2. Sketch


I've tried it many times, but no answer. Can anyone help me out?

Perhaps your just reading the wrong section. An hyperbola with a directrix? Are you sure?

I don't know if this is the best link, but this may help you both. (Go about half-way down the page.)

-Dan