通分① a/2b,b/3a²,c/4ab② 1/y-x,1/2x+2y③ 1/x²-2x+1,2/x²-1,3/x²-3x+2④ 1/2x-2,1/(x-1)²
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![通分① a/2b,b/3a²,c/4ab② 1/y-x,1/2x+2y③ 1/x²-2x+1,2/x²-1,3/x²-3x+2④ 1/2x-2,1/(x-1)²](/uploads/image/z/10330650-18-0.jpg?t=%E9%80%9A%E5%88%86%E2%91%A0+a%2F2b%2Cb%2F3a%26%23178%3B%2Cc%2F4ab%E2%91%A1+1%2Fy-x%2C1%2F2x%2B2y%E2%91%A2+1%2Fx%26%23178%3B-2x%2B1%2C2%2Fx%26%23178%3B-1%2C3%2Fx%26%23178%3B-3x%2B2%E2%91%A3+1%2F2x-2%2C1%2F%28x-1%29%26%23178%3B)
通分① a/2b,b/3a²,c/4ab② 1/y-x,1/2x+2y③ 1/x²-2x+1,2/x²-1,3/x²-3x+2④ 1/2x-2,1/(x-1)²
通分
① a/2b,b/3a²,c/4ab
② 1/y-x,1/2x+2y
③ 1/x²-2x+1,2/x²-1,3/x²-3x+2
④ 1/2x-2,1/(x-1)²
通分① a/2b,b/3a²,c/4ab② 1/y-x,1/2x+2y③ 1/x²-2x+1,2/x²-1,3/x²-3x+2④ 1/2x-2,1/(x-1)²
1 分子 6a^2 4b^2 3ac (分母都是12a^2b)
2 分子2(x+y) y-x (分母都是2(x+y)(y-x))
3 分子(x+1)(x-2) (x-1)(x-2) (x+1)(x-1) (分母都是(x+1)(x-1)^2(x-2))
4 分子 x-1 2 (分母都是2(x-1)^2)
不会