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20180905 03:03:24 0500  answered a question  Plotting systems of linear equations with 3 variables I think making a list of your points and then plotting point3d(L) would do. point3d(L) is useful to me, I think it would do what you want? In addition to my answer, I would like to say that viewers such as jmol, tachyon, etc. can show your plot. For some information about hyper arrangements, this link helps too. I search on the Internet and found this handy. doc.sagemath.org/html/.../hyperplane_arrangement/arrangement.html If you find using sage a bit hard ( I guess you won't!) you can try GeoGebra. 
20180903 03:25:38 0500  marked best answer  Typing in a command of an addingtoinfinity sum 1/1x = x^0+x^1+x^2+... How can I type in such a command of an addingtoinfinity sum? Urgent! If anyone have any answer or suggestion, please type in here! Thanks! 
20180903 03:10:16 0500  commented answer  How can I find the sum of fibonacci (1) + (2) + (4) + (7) + (11) + (16) + ... ? Thank you! 
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20180901 07:34:45 0500  marked best answer  How can I calculate this sum? (accept both sage(cocalc) and by hand) How can I calculate this sum? 1/1(x+x^2)^2

20180901 07:24:51 0500  commented answer  How can I describe incircles and calculate its area with sage? Thanks for your suggestion, I do think Geogebra is a good tool. 
20180831 10:10:41 0500  commented answer  What is the exact difference between Sage and Cocalc? Thanks for your explanation! 
20180831 10:09:04 0500  received badge  ● Popular Question (source) 
20180831 09:52:50 0500  asked a question  How can I describe incircles and calculate its area with sage? How can I describe incircles and calculate its area with sage? For example, like if you know the triangle with sides' length 4,6 and 9, how can I know the incircle's area with sage? 
20180831 09:46:41 0500  commented question  Describe in words what happens when you compute A5, A10;A20; and A30 for Well, this is a request instead of a question. Could you say clearly for what you want Sage to do? 
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20180821 00:21:08 0500  commented question  How can I calculate this sum? (accept both sage(cocalc) and by hand) Anyone could answer me after all? 
20180820 23:39:20 0500  commented question  What is the length of CD, when quadrilateral ABCD, <BAD = <ADC and <ABD = <BCD, and AB = 8, BD = 10 and BC = 6? Anyway, I can't really be sure that your answer is correct, right? :P And I must state where I get the reference in my homework, or my teacher will fail me AT ONCE. 
20180820 02:18:59 0500  marked best answer  How can I find the sum of first 20 positive perfect square? Hi! First post! When I type " k^2 for k in [1..20] ", it says " k**Integer(2) for k in (ellipsis_range(Integer(1),Ellipsis,Integer(20))) ^ SyntaxError: invalid syntax " What can I type? 
20180820 02:15:51 0500  asked a question  What is the length of CD, when quadrilateral ABCD, <BAD = <ADC and <ABD = <BCD, and AB = 8, BD = 10 and BC = 6? In quadrilateral ABCD, <bad =="" <adc="" and="" <abd="<BCD." if="" ab="8," bd="10" and="" bc="6," how="" long="" is="" cd?<="" p=""> I suspect using sin cos tan may help. Any idea how to do this, either by sage or by hand? 
20180820 01:29:00 0500  commented answer  How can I find the sum of fibonacci (1) + (2) + (4) + (7) + (11) + (16) + ... ? Moreover, as I am a beginner in using sage programme. and I am not advance in maths (Sorry!), could you explain what kind of precise questions I should ask for you to answer my question? Thanks! 
20180820 01:24:44 0500  commented answer  How can I find the sum of fibonacci (1) + (2) + (4) + (7) + (11) + (16) + ... ? Yes, I suppose that the question also wants me to add the numbers to infinity. But I guess adding up a certain amount of terms might be enough to estimate the sum of infinity of this sequence. 
20180820 01:19:36 0500  commented answer  How can I find the sum of fibonacci (1) + (2) + (4) + (7) + (11) + (16) + ... ? I appreciate you for helping me. However, what I want to do is not adding up continuous terms of the sequence. I want to add the 1st, 2nd, 4th, 7th, 10th, ... positive fibonacci numbers, which you would notice, +1 +2 +3 +4 +5 I know that this is not quite an easy question, so if you have time you could just give it a try. THANK YOU! 
20180818 01:58:30 0500  commented question  Error occurs Compiling with sage “SystemError: new style getargs format but argument is not a tuple” Do you find it a must to use sage instead of python? 
20180818 01:29:31 0500  commented question  What is the exact difference between Sage and Cocalc? I am using Cocalc recently, but I would also like to try SageMath. Could anyone give me any idea what kind of function is in SageMath but not in Cocalc? 
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20180818 01:26:01 0500  asked a question  What is the exact difference between Sage and Cocalc? Could anyone tell me, what is the difference between Sage and Cocalc? Any answers would be accepted. Thank you! 
20180818 01:21:34 0500  asked a question  How can I find the sum of fibonacci (1) + (2) + (4) + (7) + (11) + (16) + ... ? How can I find the sum of fibonacci (1) + (2) + (4) + (7) + (11) + (16) + ... ?

20180817 09:39:22 0500  answered a question  Installing 8.3 Yes, you can delete the "garbage". I am quite sure deleting wouldn't cause any loss, as long as you have successfully download Sagemath 8.3. Anyway, I think your Windows version is good enough for Sage to work efficiently, perhaps? :) 
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20180815 03:06:53 0500  answered a question  How could I notice that a SAGE program is running? If you are using Cocalc, you will see a green or blue bar when a programme is running. 
20180815 02:01:33 0500  asked a question  Microsoft Internet Explorer Version 9 or above How can I use sage without Microsoft Internet Explorer Version 9 or above? Because this is the system requirement of sage. I ask this question only for a friend, but I hope someone could give me some suggestions. Thanks! :) 
20180815 01:50:46 0500  commented question  How can I calculate this sum? (accept both sage(cocalc) and by hand) Do you mean "That" when you type "Xhat"? (to Emmanuel Charpentier) 