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	Các bình luận về: Trong không gian \(Oxyz\), cho hai đường thẳng \({d_1}:\frac{{x &#8211; 15}}{{10}} = \frac{{y &#8211; 1}}{{ &#8211; 6}} = \frac{{z + 9}}{7}\) và \({d_2}:\frac{{x + 9}}{3} = \frac{{y &#8211; 11}}{{ &#8211; 2}} = \frac{{z &#8211; 6}}{{ &#8211; 1}}\). Đường thẳng \(d\) đi qua \(A\left( {1\,;\,1\,;\,1} \right)\) lần lượt cắt \({d_1}\), \({d_2}\) tại \(B\) và \(C.\) Độ dài \(BC\) là	</title>
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