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> (1)计算:(-12)0+(13)-1×23-|tan45°-3|;(2)化简:xx-1-3(x-1)(x+2)-1,并指出x的取值范围.-数学
(1)计算:(-12)0+(13)-1×23-|tan45°-3|;(2)化简:xx-1-3(x-1)(x+2)-1,并指出x的取值范围.-数学
题目简介
(1)计算:(-12)0+(13)-1×23-|tan45°-3|;(2)化简:xx-1-3(x-1)(x+2)-1,并指出x的取值范围.-数学
题目详情
(1)计算:
(-
1
2
)
0
+(
1
3
)
-1
×
2
3
-|tan45°-
3
|
;
(2)化简:
x
x-1
-
3
(x-1)(x+2)
-1
,并指出x的取值范围.
题型:解答题
难度:中档
来源:绵阳
答案
(1)原式=1+3×
2
3
3
-
3
+1=
2+
3
;
(2)原式=
x(x+2)-3
(x-1)(x+2)
-1
=
class="stub"1
x+1
,x的取值范围是x≠-2且x≠1的实数.
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题目简介
(1)计算:(-12)0+(13)-1×23-|tan45°-3|;(2)化简:xx-1-3(x-1)(x+2)-1,并指出x的取值范围.-数学
题目详情
(2)化简:
答案
(2)原式=