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khanhlinh25052006
2 năm trước
Bài 1: Giải các phương trình : a/ 3x - 1 = x + 7 b/ 7x- 21 = 10x-9 c/ 3.(x - 1)= 2(x + 4) d/ x(x - 2)+3x -6 =0 e/ (5x + 1)^2 = (3x – 2).(5x + 1) g/ 2/(x - 1) + 2/(x + 2)=x/(x - 1).(x + 2) i/ |x - 3|=7 j/ |x - 2|+3x= 2x - 8 Bài 2: Giải các bất phương trình sau và biểu diễn tập nghiệm trên trục số: al 3.(x + 2)>-5 b/ -5x+32 lớn hơn hoặc bằng x - 9 c/ 2/3x lớn hơn hoặc bằng 6 - x/2 d/ x/2 + (2x - 1)/3 nhỏ hơn 2 e/ (3x + 2)/5 nhỏ hơn hoặc bằng (4 - 3x)/3 f/ (3x - 2)/4 lớn hơn (4 + x)/3 Giải bài 1 và 2 nha
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