共50条信息
计算\(\dfrac{{a}^{2}-1}{{a}^{2}+2a+1}÷ \dfrac{a−1}{a} \)的结果是\((\) \()\)
分式化简
\((1) (a^{2}+3a)÷\dfrac{{a}^{2}-9}{a-3} \)
\((2) (1+\dfrac{1}{m+1} )÷ \dfrac{{m}^{2}-4}{{m}^{2}+m} \)
计算:\(\dfrac{3{b}^{2}}{a}× \dfrac{a}{b} =\) .
下列计算正确的是( )
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