1 |
a+1 |
a+3 |
a2−1 |
a2−2a+1 |
(a+1)(a+3) |
1 |
a+1 |
a+3 |
(a+1)(a−1) |
(a−1)2 |
(a+1)(a+3) |
1 |
a+1 |
a−1 |
(a+1)2 |
a+1−(a−1) |
(a+1)2 |
2 |
a2+2a+1 |
2 |
8+1 |
2 |
9 |
2 |
9 |
1 |
a+1 |
a+3 |
(a+1)(a−1) |
(a−1)2 |
(a+1)(a+3) |
1 |
a+1 |
a−1 |
(a+1)2 |
2 |
a2+2a+1 |
2 |
a2+2a+1 |
分式的化简求值.
本题考查了分式的化简求值:先进行分式的乘除运算(即分子或分母因式分解、进行约分),然后进行分式的加减运算(即通分),得到最简分式或整式,接着利用整体代入的方法计算得到对应的分式的值.
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