ivana's profile - activity

I made some changes (that I did wrong in pointing out circles), and now your idea for points works perfectly. thank you

but it doesn't work for lager r (when r=2,3,4)

also I don't know why I get four, and not two solutions for points

How can I show points that I get as the result in line 11? I have that two circles, but I do not know how to get points on the graph.

var('x, y')
ft = (x+1)^2-(y)^2-1
f=circle((-1,0), 1)
p = plot(f,-5,5, thickness=2)

@interact
def _(r=(1..4)):
  g = circle((1,0), r)
  pt = plot(g,-5, 5, color='green', thickness=2)
  gt= (x-1)^2+ y^2-r
  pot = solve([ft,gt], x, y)
  html('$tocke=\;%s$'%latex(pot))
  show(  p + pt, ymin = -5, ymax = 4)

thank you!

What is the difference between Sage Notebook and SageCloud? And can anybody give me a link or sugestion how SageCloud works (Where is the server? e.t.c)?