• 试题 ID 25033


判断 $\alpha , \beta , \gamma$ 是否共面.
(1) $\alpha =(4,0,2), \beta =(6,-9,8), \gamma =(6,-3,3)$ ;
(2) $\alpha =(1,-2,3), \beta =(3,3,1), \gamma =(1,7,-5)$ .
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解析:

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