Điểm http://dientuvietnam.net/cgi-bin/mimetex.cgi?\large\widehat{PBA}=\widehat{PCA}=\dfrac{\widehat{ABC}+\widehat{ACB}}{3}
Chứng minh rằng: http://dientuvietnam.net/cgi-bin/mimetex.cgi?\large\dfrac{AC}{AB+PC}=\dfrac{AB}{AC+PB}
Poland 1997
Started By Merlyn, 07-05-2006 - 11:09
#1
Posted 07-05-2006 - 11:09
#2
Posted 09-05-2006 - 11:30
hay vậy. ??Điểm http://dientuvietnam.net/cgi-bin/mimetex.cgi?\large\widehat{PBA}=\widehat{PCA}=\dfrac{\widehat{PBA}+\widehat{ACB}}{3}
Chứng minh rằng: http://dientuvietnam.net/cgi-bin/mimetex.cgi?\large\dfrac{AC}{AB+PC}=\dfrac{AB}{AC+PB}
Impossible is nothing
#3
Posted 16-05-2006 - 15:09
Sorry! http://dientuvietnam.net/cgi-bin/mimetex.cgi?\large\widehat{PBA}=\widehat{PCA}=\dfrac{1}{3}(\widehat{ABC}+\widehat{ACB})
Đề đã được sửa,mời các bạn tiếp tục thảo luận!
Đề đã được sửa,mời các bạn tiếp tục thảo luận!
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