lim
n
11
en
n
n
1
2
x
t
0
lim sin
e
0
x
1
dt
t
1
x
x
sin
x
e
cos
3
x
cos
x
sin
2
x
dx
1
0
1ln(
1
x
)
x
2
dx
1
x
0
ln
x
2006dx
.
2
n
!
n
1
n
.
)(
tx
t
1
u
ln
duu
,
)(
ty
2
t
1
xu
ln
udu
t
2
2
u
3
s
ln
sds
du
dy
etdx
.
dxdy
D
y
1y
y
x
y
3
e
D
y
dxdydz
z
I
z
,0
z
1
2
2
x
a
2
2
y
b
2
z
,(1
ba
)0
x
2
xy
dx
xy
2
y
dy
,
L
I
L
2
2
x
a
2
2
y
b
,1
(
x
,0
a
b
)0
)1,0(
2R
]1,0[
f
],[ ba
a
x
1
x
2
x
n
(
nb
),3
,
n
1
,
,
2
1
2
n
1
c
( 1
nxx
,
)
( )
f c
1
(
f x
1
)
2
(
f x
)
n
(
f x
).
n
2
f
[ , ]a b
( )
f a
( )
f b
[ , ]a b
b
a
( )
f x dx
(
0
e
2
)
a u t
sin
,(
tdt a
0)
f
( )
1
b a
2
u
[0,
)
(
)
a u t
2
0
e
sin
,(
tdu a
0)
t
[0,
)