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DragonBoy
Cho dãy số $1,3,2,1,-1,2,3,a,b,....$
Tìm $a,b$
Hạ sĩ
Cho dãy số $1,3,2,1,-1,2,3,a,b,....$ Tìm $a,b$ hiện em lớp 6 hỏi
1+2=3
3-1=2
2+(-1)=1.....
a=-1
b=-4
Boy đa tình
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