已知级数∞n=1an收敛,则下列结论不正确的是()A.∞n=1(an+an+1)必收敛B.∞n=1(a2n+a2n+1)必收敛C.∞n=1(a2n-a2n+1)必收敛D.∞n=1(a2n-a2n+1)必收敛
已知级数∞ |
|
n=1 |
an收敛,则下列结论不正确的是( )
A.∞ |
|
n=1 |
(an+an+1)必收敛
B.∞ |
|
n=1 |
(a2n+a2n+1)必收敛
C.∞ |
|
n=1 |
(a2n-a2n+1)必收敛
D.∞ |
|
n=1 |
(-)必收敛
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