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ngochan12801
2 năm trước
Chứng minh rằng tổng so nghiệm nguyên không âm cua các pt:x+2y=n,2x+3y=n-1,....nx+(n+1)y=1,(n+1)x+(n+2)y=0 đúng bằng n+1 với mỗi số nguyên dương n(giúp mk vs mn ơi)
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