Trang chủ » Hỏi đáp » Môn Toán `[2/(3x)-2/(x+1).((x+1)/(3x)-x-1)]:(x-1)/x` 22/06/2023 `[2/(3x)-2/(x+1).((x+1)/(3x)-x-1)]:(x-1)/x`
[2/(3x) – 2/(x+1) * ((x+1))/(3x) – x -1 ] : (x-1)/(x) ĐKXĐ : x \ne 0;+-1 = [ 2/(3x) – 2/(x+1) * ((x+1)/(3x) – (3x^2)/(3x) – (3x)/(3x) ] : (x-1)/(x) = [2/(3x) – 2/(x+1) * (-3x^2 -2x+1)/(3x) ] : (x-1)/x = ( 2/(3x) – (2*(-3x^2 -2x+1))/((x+1)*3x) ) : (x-1)/x = ( 2/(3x) – (-2(3x-1))/(3x) ) : (x-1)/x = (2 +6x -2)/3x * (x)/(x-1) = 2 * (x)/(x-1) = (2x)/(x-1) Trả lời
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