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vydelly912
1 năm trước
Bài 1: Cho biểu thức : A= 2x/(x-3)+x/(x+3) + (2x^2+3x+1)/(9-x^2 ) và B=(x-1)/(x+3) (ĐK: x≠ ±3; x≠ ±1) a) Tính B khi x = 5 b) Rút gọn biểu thức P= A : B c) tìm giá trị nguyên của của x để P có giá trị là số tự nhiên Bài 2: a)(2x-5)/(x-1)≥2 b| 3x-1|+2 = x
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