Re: Finding set of possible values of a given function

Ray,

Just a quick note to say thank you. I've been working through your e-
mail for about an hour - especially paragraph 2 about finding L and U.
It's not fully making sense to me, but I think it might be easier
tomorrow as it's late here now.

One thing you do is set the function equal to v. This is really
interesting. I've always seen the function set equal to zero and have
only ever really thought about finding root that are x-intercepts. I
didn't know you could set it equal to another value to find the roots
there. It sounds so fundamental a thing to want to do though.

The next chapter introduces differentiation so at the moment I'm still
pre-calculus. I really want to understand inequalities and quadratics
as much as possible before moving on though.

Will let you know how I get on when I can visit your e-mail again.

Regards,

Pete
.