Cho http://dientuvietnam..._{k 1},..,a_n>0 cố định; http://dientuvietnam...gi?a_1,...a_k>0 thay đổi.Tìm min:
http://dientuvietnam.net/cgi-bin/mimetex.cgi?P=\sum\dfrac{a_i}{a_j} ( )
bdt với n số
Started By T3_khtn, 29-06-2006 - 23:31
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