Question

急 (12 21:16:10)1/(4－X)  ＋  1/(X－2)(X－3)

Answer 1

1/（4-X）+1/(X－2)-1/(X－3) +1/(X－3)-1/(X－4)

=2/(4－X) +1/(X－2)

=（2X-4+4-X）/(X－2)(4-X)

=X/(X－2)(4-X)