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2018-09-05 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.

2018-09-03 03:25:38 -0500 marked best answer Typing in a command of an adding-to-infinity sum

1/1-x = x^0+x^1+x^2+...

How can I type in such a command of an adding-to-infinity sum?

Urgent! If anyone have any answer or suggestion, please type in here! Thanks!

2018-09-03 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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2018-09-01 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

  • This is the sum of infinity formula : a/1-r, while a=1 and r=(x+x^2)^2 Please also confirm if my formula is right.
2018-09-01 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.

2018-08-31 10:10:41 -0500 commented answer What is the exact difference between Sage and Cocalc?

Thanks for your explanation!

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2018-08-31 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?

2018-08-31 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?

2018-08-22 10:30:27 -0500 received badge  Supporter (source)
2018-08-21 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?

2018-08-20 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.

2018-08-20 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?

2018-08-20 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="&lt;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?

2018-08-20 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!

2018-08-20 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.

2018-08-20 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!

2018-08-18 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?

2018-08-18 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?

2018-08-18 01:29:31 -0500 received badge  Commentator
2018-08-18 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!

2018-08-18 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) + ... ?

  • The numbers in () means the terms of fibonacci sequence
2018-08-17 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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2018-08-15 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.

2018-08-15 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! :)