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> (1)计算:(-14)-1-38+(5-2)0+2cos60°;(2)解方程:4xx-2-1=32-x.-数学
(1)计算:(-14)-1-38+(5-2)0+2cos60°;(2)解方程:4xx-2-1=32-x.-数学
题目简介
(1)计算:(-14)-1-38+(5-2)0+2cos60°;(2)解方程:4xx-2-1=32-x.-数学
题目详情
(1)计算:
(-
1
4
)
-1
-
3
8
+(
5
-2
)
0
+2cos60°
;
(2)解方程:
4x
x-2
-1=
3
2-x
.
题型:解答题
难度:中档
来源:不详
答案
(1)原式=-4-2+1+1=-4;
(2)去分母得:4x-x+2=-3,
移项合并得:3x=-5,
解得:x=-
class="stub"5
3
,
经检验x=-
class="stub"5
3
是原分式方程的解.
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题目简介
(1)计算:(-14)-1-38+(5-2)0+2cos60°;(2)解方程:4xx-2-1=32-x.-数学
题目详情
(2)解方程:
答案
(2)去分母得:4x-x+2=-3,
移项合并得:3x=-5,
解得:x=-
经检验x=-