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Subiecte examen
Analiz matematic aplicaii Stan Gabriel
Partea nti
I. Studiai natura seriilor urmtoare:
1) 0,11
2
2
>
++
=
an
nnan
n 2)
=
1
2!n
n
n
nn 3) ( )
( )
= 12!4
!2n
n nn 4) ( )( )
=
1
2
1385223741
n nn
5) ( )( )
= +
1 111
n
n
nn 6) ( ) ( ) 0,1
!1
>++
=
anaaa
nn
7) ( )
= ++
1
2 211
n
n
nn
8) ( )( )[ ] 0,11
>++
=
anannn
n 9) ( )
=
+
1 11
2642127531
n nnn
II. S se determine raza de convergen i domeniul de convergen pentru seriile urmtoare:
10) nn
n xn
= 1 21 11) n
n
nx
n
=
+
1
11 12) ( ) ( )nn
n xnn 3
121
12 ++
=
13) ( )nn
xnn
n 21
11
2 ++++
=
14) ( ) nn
nn x
n
=
1
31 15) nn
n xn2
1 41
= 16) n
nx
nn
= ++
12 2
1
III. Calculati sumele seriilor urmatoare:
17)
= ++12 23
1n nn
18) ( )
= +0 !1n nn 19)
=
+
0 123443
nn
nn
20)
=
22
2 1lnn n
n