I understand #2 on what skeeter wrote. I understand on #3 when the is multiplied back. What happened to the x in #2? I see the negative got distributed, but why is x not being added to each term?
I understand #2 on what skeeter wrote. I understand on #3 when the is multiplied back. What happened to the x in #2? I see the negative got distributed, but why is x not being added to each term?
Thanks
why would x be added to each term? ... just subtract the series for arctan(x) from x.