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FOR i = 1 TO 20
Yes, sorry about that. My excuse is that I was being harassed by the slow re-load time on pages. It was driving me mad. Originally I just posted the method. Then I had the idea to work out the answer but hide it. But I was completely off track because I had been thinking that 'y' divided the line in the ratio a:b ie 2:3 so I posted a + b = 5.
The site is okay for me
This sounds very interesting.
The standalone or the one bundled with geogebra.
What CAS are you using?
jimmyR is his username.
Yes, he is a member but he does not like forums.
I haven't got an idea to find the derivative except using a CAS.