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Xuandanh0904
2 năm trước
B1:Cho phương trình: (m + 4)x2 – 2(2m + 9)x – 4 =0 (1) Tìm m để phương trình (1) là phương trình bậc nhất một ẩn B2:Giải và biện luận phương trình (*) sau đây với a;b là tham số 2a(x-1)=x+b (*) B3:Cho biểu thức R=$\frac{x^{2}+x+1}{x}$ ĐKXĐ:x≠1;x≠0 Tìm GTNN của R với x > 0
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