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smilelovenp
2 năm trước
Biết $\frac{c}{d}$ = $\frac{m}{n}$ a, chứng minh $\frac{c+d}{d}$ = $\frac{m+n}{n}$ b, chứng minh $\frac{c^3+d^3}{d^3}$ = $\frac{m^3+n^3}{n^3}$ NHANH NHA MỌI NGƯỜI!!!
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