¬ What does this symbol mean and how is it used?
in [Math]
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From: Ben on 30 Mar 2005 02:09 My girlfriend is trying to do some financial coursework. In the book she is reading it uses ý in the calculation. After searching around on the internet we have found it is the /neg symbol. But what does it mean and how is it used. In the book the following step is shown in a calculation. (##note## to show powers I have put them on the line above (showing superset) and the line below shows the subset numbers. -2 -4 50.6(1.1) A * (1.1) 3ý0.10 50.6 * 0.83 * 2.49 * 0.91 = ý+95 163 So we know that A = 2.49. 3ý0.10 But we can't work out why. Any help would be greatly appreciated. Thankyou for you time. Ben & Angel.
From: G. A. Edgar on 30 Mar 2005 08:15 In article <c2d24516.0503292309.1b061feb(a)posting.google.com>, Ben <bs2k1(a)excite.com> wrote: > My girlfriend is trying to do some financial coursework. In the book > she is reading it uses ý in the calculation. After searching around > on the internet we have found it is the /neg symbol. But what does it > mean and how is it used. In the book the following step is shown in a > calculation. (##note## to show powers I have put them on the line > above (showing superset) and the line below shows the subset numbers. > > -2 -4 > 50.6(1.1) A * (1.1) > 3ý0.10 > > 50.6 * 0.83 * 2.49 * 0.91 = ý+95 163 > > > So we know that A = 2.49. > 3ý0.10 > > But we can't work out why. > > > > Any help would be greatly appreciated. Thankyou for you time. > > Ben & Angel. The symbol "\neg" in TeX is used in symbolic logic for negation. But this is not what you have here. In A = 2.49. 3ý0.10 is the horizontal actually above the 3, and the vertical between the 3 and the 0.10 ? (If not, it should be.) This is the present value of an annuity with 3 periods at interest rate 0.10, computed as: (1-(1+0.10)^(-3))/0.10 = 2.48685 Isn't this defined in the text? Look up "present value" in the index to see if it is... -- G. A. Edgar http://www.math.ohio-state.edu/~edgar/
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