3/x+1 + 3/x-1

3/x+1 + 3/x-1

Penyelesaian

     3     +      3     = 3(x – 1) + 3(x + 1)

  x + 1        x – 1      (x + 1)( x – 1)

= 3x – 3 + 3x + 3

       (x2 – 1)

=     6x    .

    x2 – 1