2024-01-11 22:01:51 +0200 received badge ● Notable Question (source) 2024-01-11 22:01:51 +0200 received badge ● Popular Question (source) 2020-11-24 00:33:15 +0200 asked a question How to define y=constant function to plot Hi! I'm newbe with SageMath and i would like to make an y=constant function to plot but i don't find a way to do it. I can do x=constant functions plot easily: c=1 plot(c, (x,-2,2)) But how can I do y=constant if it is possible!? Thanks! 2020-11-21 22:19:49 +0200 received badge ● Scholar (source) 2020-11-21 19:01:06 +0200 received badge ● Nice Question (source) 2020-11-21 16:26:21 +0200 received badge ● Editor (source) 2020-11-21 16:21:18 +0200 received badge ● Student (source) 2020-11-21 15:23:38 +0200 asked a question solve result contain variable which to solved Hi! I'm newbie with Sage please help me what I'm doing wrong! I do: (a,l,x) = var('a,l,x') solve(1/(a*(x-1))==(sqrt(x^2+1^2)/2/l),x) --> [x == (sqrt(x^2 + 1)*a + 2*l)/(sqrt(x^2 + 1)*a)]  Why x result contain x itself!? It's not ture for any x. If I set a,l params a=24 l=1.28 solve(1/(a*(x-1))==(sqrt(x^2+1^2)/2/l),x) --> [x == 1/75*(75*sqrt(x^2 + 1) + 8)/sqrt(x^2 + 1)]  So result still contain x itself... I'm confused about it. Thanks for help.