問(wèn)答題設(shè)a1=(6,a+1,3),a2=(a,2,-2),a3(a,1,0),a4=(0,1,a),試問(wèn):a為何值時(shí),a1,a2,a3,a4線(xiàn)性相關(guān)、線(xiàn)性無(wú)關(guān)?

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