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3 3
2017
-
0.51
0.5
2
0.5
0.5
0.5
I
2
( ) 1 ( 1) x
g x x e
0.251
12
II
2
( ) 1 1 x
f x x x e
(
)
0.751
2
2
( ) 1 4 2
xx
x
f x x e e
0.5
lim ( ) 1
xf x x
0.25
0.5 2
(
11
1x
x x e
xx
)
0.25
0.753
0.75
0.75
14
(
)
505
0.75
02
1
2
1 3 1
x
x e dx e
0.5