thanks for the replies lads, this appears to make a lot more sense now (note: just finished 14hr shift, and its 2am), but alas, if it sinks in now, it'll sink in tomorrow.
i'm not going to try and attempt math now, but tomorrow i'm going to sit down having read these posts, and i think there was 2 other IVT proofs in the course manual. is it cool if i post the proofs to these q's tomorrow and have you's look over them?
again, thanks so much
