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【简答题】
若级数【图片】和级数【图片】都绝对收敛，其和分别等于【图片】,则对无穷级数的乘积中【图片】按任意顺序排列所得到的级数也（ ）收敛,且其和等于【图片】.
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举一反三
【单选题】They went on well at first but eventually everything they worried about happened.
A.
which
B.
what
C.
that
D.
when
【单选题】A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they di...
A.
40
B.
50
C.
72.72
D.
80
【单选题】A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they di...
A.
15
B.
27.27
C.
30
D.
50
【单选题】A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they di...
A.
15
B.
27.27
C.
30
D.
50
【单选题】They went on well at first but eventually everything ______ they had worried about happened．
A.
which
B.
what
C.
that
D.
When
【单选题】They went on well at first but eventually everything ______ they had worried about happened．
A.
which
B.
what
C.
that
D.
when
【单选题】A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they di...
A.
15
B.
27.27
C.
30
D.
55
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