问题
解答题
化简并求值:(1+
|
答案
原式=
÷x x-1
=x2 x2-1
•x x-1
=x2-1 x2
•x x-1
=(x-1)(x+1) x2
,x+1 x
当x=
-1时,原式=2
=2+2
-12
.2
化简并求值:(1+
|
原式=
÷x x-1
=x2 x2-1
•x x-1
=x2-1 x2
•x x-1
=(x-1)(x+1) x2
,x+1 x
当x=
-1时,原式=2
=2+2
-12
.2
问答题:
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图1 | ![]() |
图2 |
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图3 | ![]() |
图4 |
(1)图1的历史人物是谁?
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