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2020-11-24 00:33:15 +0200 asked a question How to define y=constant function to plot


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!?


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2020-11-21 15:23:38 +0200 asked a question solve result contain variable which to solved


I'm newbie with Sage please help me what I'm doing wrong!

I do:

(a,l,x) = var('a,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




--> [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.