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hongngoc8498
2 năm trước
Trong không gian Oxyz, cho điểm A(1;−1;2) và hai mặt phẳng (α):2x+y−z+1=0, (β):x+2y+z+3=0. Mặt phẳng (P) đi qua điểm A và vuông góc với cả hai mặt phẳng (α),(β) có phương trình là A. x+y+z−2=0. B. x+y−z+2=0. C. x−y+z−4=0. D. x−y−z=0. Các bạn giúp mình với mình đqng cần gấp
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