N TP CHặNG IV (tt)
Baỡi 1:Xeùt tờnh lión tuỷc cuớa caùc haỡm sọỳ sau taỷi x
0
a)





=



=
2,16
2,
2
16
)(
4
x
x
x
x
xf
taỷi x
0
= 2
b)



>

+
=
1,32
1,
1
245
)(
2
23
xx
x
x
xxx
xf
taỷi x
0
= 1
d)





=
+
=
0,1
0,

4
0,
11
)(
x
x
x
a
x
x
xx
xf
taỷi x
0
= 0
b)





+
>


=
1,2
1,
1
123

23
)(
3
2
xbx
xa
x
x
xx
xf
taỷi x
0
= 2
d)






<<+

=
5,7
53,
3,1
)(
x
xbax
x