MCQ
The length of the $\perp$
- A$0$
- B$2\sqrt{3}$
- C$\frac{2}{3}$
- ✓$2$
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($A$) $\quad \alpha=0, k=8$
($B$) $4 \alpha-k+8=0$
($C$) $\operatorname{det}(P \operatorname{adj}(Q))=2^9$
($D$) $\operatorname{det}(Q \operatorname{adj}(P))=2^{13}$