$\frac{a}{b}$ $\color{black}{sau}$ $\color{black}{khi}$ $\color{black}{rút}$ $\color{black}{gọn}$ $\color{black}{được}$ $\frac{-8}{11}$ $\color{black}{biết}$ $\color{black}{b-a=190}$. $\color{black}{Tìm}$ $\frac{a}{b}$
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Sinh Học lớp 12
