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	Các bình luận về: Đề: Cho tứ diện \(S.ABC\) có tam giác \(ABC\) vuông tại \(B\), \(AB = a\), \(BC = a\sqrt 3 \) và \(SA = a\sqrt 2 \),\(SB = a\sqrt 2 \), \(SC = a\sqrt 5 \).Tính bán kính mặt cầu ngoại tiếp tứ diện \(S.ABC\).	</title>
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