初二的通分题【急】通分 ^后面是次方!1/2a^b,3/4ab^2,5/6ac^2 1/x-1,1/x+1,3x/x^2
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初二的通分题【急】
通分 ^后面是次方!
1/2a^b,3/4ab^2,5/6ac^2
1/x-1,1/x+1,3x/x^2-1
x+2/x^2-2x,x-1/x^2-4x+4
通分 ^后面是次方!
1/2a^b,3/4ab^2,5/6ac^2
1/x-1,1/x+1,3x/x^2-1
x+2/x^2-2x,x-1/x^2-4x+4
![初二的通分题【急】通分 ^后面是次方!1/2a^b,3/4ab^2,5/6ac^2 1/x-1,1/x+1,3x/x^2](/uploads/image/z/19832778-18-8.jpg?t=%E5%88%9D%E4%BA%8C%E7%9A%84%E9%80%9A%E5%88%86%E9%A2%98%E3%80%90%E6%80%A5%E3%80%91%E9%80%9A%E5%88%86+%5E%E5%90%8E%E9%9D%A2%E6%98%AF%E6%AC%A1%E6%96%B9%211%2F2a%5Eb%2C3%2F4ab%5E2%2C5%2F6ac%5E2+1%2Fx-1%2C1%2Fx%2B1%2C3x%2Fx%5E2)
1、1/2a^2b=6bc^2/(12a^2b^2c^2)
3/4ab^2=9ac^2/(12a^2b^2c^2)
5/6ac^2=10ab^2/(12a^2b^2c^2)
2、1/x-1=(x+1)/(x^2-1)
1/x+1=(x-1)/(x^2-1)
3x/x^2-1=3x/(x^2-1)
3、x+2/x^2-2x=(x+2)(x-2)/[x(x-2)^2]
x-1/x^2-4x+4=x(x-1)/[x(x-2)^2]
3/4ab^2=9ac^2/(12a^2b^2c^2)
5/6ac^2=10ab^2/(12a^2b^2c^2)
2、1/x-1=(x+1)/(x^2-1)
1/x+1=(x-1)/(x^2-1)
3x/x^2-1=3x/(x^2-1)
3、x+2/x^2-2x=(x+2)(x-2)/[x(x-2)^2]
x-1/x^2-4x+4=x(x-1)/[x(x-2)^2]
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