题目内容
计算:(1+x)(
-
)
x-1 |
x2+x |
1-x |
x3-x |
原式=(1+x)[
+
](4分)
=
+
(5分)
=1.(6分)
x-1 |
x(x+1) |
x-1 |
x(x+1)(x-1) |
=
x-1 |
x |
1 |
x |
=1.(6分)
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题目内容
x-1 |
x2+x |
1-x |
x3-x |
x-1 |
x(x+1) |
x-1 |
x(x+1)(x-1) |
x-1 |
x |
1 |
x |