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hanhhanhhanh
2 năm trước
Giúp mình với mình hứa vote 5 sao Cho tam giác ABC vuông tại A. Kẻ AH vuông góc với BC (H thuộc BC) . Chứng minh rằng: Ah = 1/√2 x √BC(bình) - BH(bình) - HC(bình) Bình tức là bình phương do mình dùng Đt nên ko ghi mũ đc
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