4. (2.5pt), l£l Ebe
II
CantDI'
!ti.
If / 1,:,:} =
1
and find lhc
\'ll.lUC
f l,x}dJ .
of /
1
{:2
x E E'
11.~
XI Ei
,
prove 1hM / 1s
1
1
I
Riemnm1 lmcgrable on 10.
11