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如图,在平行四边形ABCD中,E是边BC上的点,AE交BD于点F,如果,那么= ...
如图,在平行四边形ABCD中,E是边BC上的点,AE交BD于点F,如果
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101802288577401/SYS201311031018022885774025_ST/0.png)
,那么
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101802288577401/SYS201311031018022885774025_ST/1.png)
=
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101802288577401/SYS201311031018022885774025_ST/images2.png)
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