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> 请你先将式子2009aa2-2a+1÷(1+1a-1)化简,然后从0≤a≤3的范围中选择一个恰当的整数作为a的值代入其中求值.-数学
请你先将式子2009aa2-2a+1÷(1+1a-1)化简,然后从0≤a≤3的范围中选择一个恰当的整数作为a的值代入其中求值.-数学
题目简介
请你先将式子2009aa2-2a+1÷(1+1a-1)化简,然后从0≤a≤3的范围中选择一个恰当的整数作为a的值代入其中求值.-数学
题目详情
请你先将式子
2009a
a
2
-2a+1
÷(1+
1
a-1
)
化简,然后从0≤a≤3的范围中选择一个恰当的整数作为a的值代入其中求值.
题型:解答题
难度:中档
来源:文安县一模
答案
原式=
class="stub"2009a
(a-1)
2
÷
class="stub"a-1+1
a-1
(3分)
=
class="stub"2009a
(a-1)
2
×
class="stub"a-1
a
(4分)
=
class="stub"2009
a-1
(5分)
当a=2时,原式=2009(或a=3时,原式=1004
class="stub"1
2
).(8分)
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先将代数式(x-xx+1)÷(1+1x2-1
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先化简,再求值:(x2+x-1x-1-1)÷xx2
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题目简介
请你先将式子2009aa2-2a+1÷(1+1a-1)化简,然后从0≤a≤3的范围中选择一个恰当的整数作为a的值代入其中求值.-数学
题目详情
答案
=
=
当a=2时,原式=2009(或a=3时,原式=1004