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> 化简(1+1x-1)÷xx2-1得______,当x=______(选择一个你喜欢的x值)时,求得原式的值为______.-数学
化简(1+1x-1)÷xx2-1得______,当x=______(选择一个你喜欢的x值)时,求得原式的值为______.-数学
题目简介
化简(1+1x-1)÷xx2-1得______,当x=______(选择一个你喜欢的x值)时,求得原式的值为______.-数学
题目详情
化简
(1+
1
x-1
)÷
x
x
2
-1
得 ______,当x=______(选择一个你喜欢的x值)时,求得原式的值为 ______.
题型:填空题
难度:中档
来源:不详
答案
(1+
class="stub"1
x-1
)÷
class="stub"x
x
2
-1
=
class="stub"x
x-1
×
(x-1)(x+1)
x
=x+1
,
由原式,知x≠0,±1,
故若取x=2时,则原式的值为3.
故答案为:x+1,2,3.
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题目简介
化简(1+1x-1)÷xx2-1得______,当x=______(选择一个你喜欢的x值)时,求得原式的值为______.-数学
题目详情
答案
由原式,知x≠0,±1,
故若取x=2时,则原式的值为3.
故答案为:x+1,2,3.