Question

求解 简化

Answer 1

1/x + x/(x^2+1) = (2x^2+1)/[x(x^2+1)]
1/x - x/(x^2+1) = 1/[x(x^2+1)]
=>
[1/x + x/(x^2+1)]/[1/x - x/(x^2+1)]
=2x^2+1

追问

我知道你打字不容易谢谢！但是我看的有点儿懵能不能发写在纸上的过来呢！