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若数列{an}(n∈N+)为等差数列,则数列也为等差数列,类比上述性质,相应地,若数列{c...
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若数列{a
n}(n∈N
+)为等差数列,则数列
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)
也为等差数列,类比上述性质,相应地,若数列{c
n}是等比数列且c
n>0(n∈N
+),则有数列d
n=________(n∈N
+)也是等比数列.
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