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buivanlam805
2 năm trước
cho biểu thức C=(($\frac{x}{x+2}$ + $\frac{5x-12}{5x^2-15}$ -$\frac{8}{5x^2+10x}$):$\frac{x^2-2x+2}{x^2-x-6}$ a) tìm ĐK để C xác định b)rút gọn biểu thức C c) tìm x để C nhỏ nhất. xác định GTNN d)tìm x ∈ Z để C ∈ Z
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