共50条信息
如图所示,在\(\triangle \)\(ABC\)中,\(AD\)\(=\)\(DB\),点\(F\)在线段\(CD\)上,设\(\overrightarrow{AB}=a\),\(\overrightarrow{AC}=b\),\(\overrightarrow{AF}=xa+yb\),则\(\dfrac{1}{x}+\dfrac{4}{y}\)的最小值为( )
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