# Math Help - how do i differentiate 1/(1+x^2) ten times

1. ## how do i differentiate 1/(1+x^2) ten times

as in the title

how do i differentiate arctan(x) ten times

i have to show each differential, is that even possible, i got up to f'''', but then it just goes mental, is there a simpler way of doing it, or an trig identity i dont noe of.

thanks

2. ## Re: how do i differentiate 1/(1+x^2) ten times

Originally Posted by newkidz
as in the title

how do i differentiate arctan(x) ten times

i have to show each differential, is that even possible, i got up to f'''', but then it just goes mental, is there a simpler way of doing it, or an trig identity i dont noe of.

thanks
Note that this post is part of an assessment question posted earlier in the calculus forum ...