ATAR Notes: Forum

VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Mathematical Methods CAS => Topic started by: NE2000 on November 04, 2009, 12:24:15 pm

Title: Time in a pdf
Post by: NE2000 on November 04, 2009, 12:24:15 pm: In a pdf you're normally given $0, elsewhere$ to generally tell you to draw the graph at zero extending to negative and positive infinity. But what if the x-axis is time? Normally time is only defined for $t \geq 0$ so can you extend your time, even if it is zero, into the past?
Title: Re: Time in a pdf
Post by: NE2000 on November 05, 2009, 09:24:59 am: bump
Title: Re: Time in a pdf
Post by: almostatrap on November 05, 2009, 01:46:43 pm: since it is only the probability of negative time, not an actual value for negative time, i would say do it as usual. because the probability of something that's impossible is zero. maybe!
Title: Re: Time in a pdf
Post by: THem on November 05, 2009, 02:58:44 pm: I'm not 100% sure but I've encountered a similar question before and the solutions stopped at 0.