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thuytrangcv0812
2 năm trước
1)CMR:n-5/3n-14 là phân số tối giản với số nguyên n. 2)Tìm số nguyên n để phân số 2n-1/3n+2 rút gọn được. 3)Tím các số tự nhiên a và b biết rằng a/b=49/56 và ƯCLN(a,b)=12 các bạn giúp mình với mình cảm ơn rất nhiều
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