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2013-01-25 09:10:41 +0200 | asked a question | Combining intervals Hi, is it possible to do the following and get a result?: $(\overline{(-4,1)}\cup[0,\infty)) \backslash ((-\infty,4)\cap[-1,3])$ Plotting would also be nice. |
2013-01-02 08:31:36 +0200 | received badge | ● Scholar (source) |
2013-01-02 08:31:36 +0200 | marked best answer | Longer fraction to decimal number The problem is that for Sage (-1)^(1/3) is complex (and you have negative numbers in parentheses) If you need the real solution you can use (-abs(a))^(1/3)=-(abs(a))^(1/3), a-real If your equation is polynomial and you need the real roots you can also use roots() |
2013-01-02 08:31:30 +0200 | commented answer | Longer fraction to decimal number ok, thanks |
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2013-01-02 08:30:34 +0200 | commented answer | Longer fraction to decimal number yes, i know |
2013-01-01 07:44:56 +0200 | commented answer | Longer fraction to decimal number Wired, it prints 0.0152696093516960 - 1.11580160984665*I but the GNOME's "gcalctool" default calculator gives -8.030539219. Also from the plot in geogebra I know that it's -8.03. |
2013-01-01 06:08:55 +0200 | asked a question | Longer fraction to decimal number After
Now how to show this as decimal? float(x) and R = RealField(50); R(x) doesn't seem to work. |
2012-12-31 10:37:14 +0200 | received badge | ● Editor (source) |
2012-12-31 10:34:40 +0200 | asked a question | solve(abs(x+3) - abs(2-3*x) < 2) Is it possible to solve something like this? (tried by gives me error): solve(abs(x+3) - abs(2-3*x) < 2) |