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Minh Vũ Nguyễn
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2024-04-02 23:40:19
giải phương trình :x=2023/1+x-2022/2+x-2021/3+.....+x-1/2023+x/2024=2024
2024-04-02 22:24:14
VT= x2+4y2+z2-4x+4y-8z+23
= (x2-4x+4)+(4y2+4y+1)+(z2-8z+16)+2
= (x-2)2+(2y+1)2+(z-4)2+2>0
vây không tồn tại x,y,z để phương trình trên có nghiệm