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Mar
6
comment How to find the complex number has least and greatest modul satisfying a given condition?
No. But I think, the solution does not exactly.
Feb
24
comment How do I replace a variable in a polynomial?
see mathematica.stackexchange.com/questions/42121/…
Feb
17
comment How to avoid CopyTensor in CompiledFunctions?
@ Dao Trinh. Năm sau kỉ niệm 20 năm thành lập trường. Một số cựu học sinh thành lập học bổng mang tên Lương Thế Vinh. Bạn vào trang wew của trường để biết thêm thông tin. Sẽ có lời ngỏ của thầy Trần Anh Dũng, Hiệu trưởng nhà trường.
Feb
16
comment How to avoid CopyTensor in CompiledFunctions?
TRINH Tôi là giáo viên. Trường LTV sắp xây đó bạn. Cuối tháng Năm này là đập trường đó. Bạn học khoá bao nhiêu? Lớp chuyên gì?
Feb
16
comment How to avoid CopyTensor in CompiledFunctions?
Trinh. Bạn có học tại trường Lương Thế Vinh, Đồng Nai không?
Feb
11
comment How to substitute the following conditions into an expression?
Thank you for your answer.
Jan
15
comment Find all values of the paramaters $m$ for which the equation has four roots smaller 2
How about with equation t^4 + 2 (m + 1) t^2 + m + 7==0?
Jan
7
comment Reduce with Integer domain, but receive a rational solution
My version of Mathematica is 9.0.0. I obtained d is -12 (-3 - 12 k + 6 m - 2 k m - 3 m^2 + 2 k m^2). I edited f[x].
Jan
7
comment Reduce with Integer domain, but receive a rational solution
I am not using 9.0.1
Dec
21
comment How can I find the sum of the even digits of a number of all elements of a list?
@ Mr.Wizard. Thank you for your help.
Nov
18
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
let us continue this discussion in chat
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
I want the triangle ABC is not a right triangle. But with three vertices {{-3, -2, 1}, {-3, -2, 5}, {5, 6, 1}}, this is a right triangle. where is wrong in my code?
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
Maybe my Pick[...] is wrong. Please help me.
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
For example {-3, 4, -1}, {-1, 6, 7}, {3, 6, 7}
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
@DanielLichtblau I can not. Please help me.
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
I check some circle. It's wrong. That is mean center not at $(1,2,3).
Nov
16
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
@SjoerdC.deVries Please check my code. Am I wrong? I want to choose the triangles aree not right triangle.
Nov
16
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
@belisarus You wrote Flatten[tt, 1], {3}]. What is the tt?
Nov
15
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
You are wrong. For example three points (-3, -2, 1), (-3, -2, 5) and (-3, 0, -1) has centre (-3,2,3).
Oct
29
comment How to find the domain and range of an implicit function?
Perhalf it is wrong with the function f[x_] := (x^2 + x + 1) (x^2 + x + 2)