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	<description>TRI THỨC CŨNG CẦN NHƯ KHÍ THỞ</description>
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		<title>TỔNG HỢP BÀI TẬP VECTƠ LỚP 10</title>
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		<dc:creator><![CDATA[sieusale.day]]></dc:creator>
		<pubDate>Sun, 03 Oct 2021 13:47:41 +0000</pubDate>
				<category><![CDATA[Toán 10]]></category>
		<category><![CDATA[Hình học]]></category>
		<category><![CDATA[tâm tỉ cự]]></category>
		<category><![CDATA[trọng tâm]]></category>
		<category><![CDATA[véc-tơ]]></category>
		<category><![CDATA[vecto]]></category>
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					<description><![CDATA[TỔNG HỢP BÀI TẬP VECTƠ LỚP 10 BÀI TẬP VECTƠ LỚP 10: Chứng minh các đẳng thức vectơ Ví dụ 1. Cho 6 điểm $A, B, C, D, E, F$. Chứng minh rằng: (bằng nhiều cách khác nhau) $\overrightarrow{AB}+\overrightarrow{CD}=\overrightarrow{AD}+\overrightarrow{CB}$ $\overrightarrow{AB}-\overrightarrow{CD}=\overrightarrow{AC}+\overrightarrow{DB}$ $\overrightarrow{AD}+\overrightarrow{BE}+\overrightarrow{CF}=\overrightarrow{AE}+\overrightarrow{BF}+\overrightarrow{CD}$ Ví dụ 2. Cho tam giác $ABC$ với $M, N, P$ là trung điểm [&#8230;]]]></description>
		
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