问答题

对于数列{xn},如果,试证明:

A.174.24.96:6088/Latex/latex.action?latex=XGxpbV97a1x0b1xpbmZ0eX14X3syay0xfT1h'
B.174.24.96:6088/Latex/latex.action?latex=XGxpbV97a1x0b1xpbmZ0eX14X3sya309YQ%3D%3D'
C.174.24.96:6088/Latex/latex.action?latex=XGxpbV97blx0b1xpbmZ0eX14X3tufT1h'
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