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> 计算下列各题(1)2x27x+6x43x(2)cos30°+sin45°-tan30°•tan60(3)27-1513+1448+12(4)27+2sin30°+(x-2)0-2.-数学
计算下列各题(1)2x27x+6x43x(2)cos30°+sin45°-tan30°•tan60(3)27-1513+1448+12(4)27+2sin30°+(x-2)0-2.-数学
题目简介
计算下列各题(1)2x27x+6x43x(2)cos30°+sin45°-tan30°•tan60(3)27-1513+1448+12(4)27+2sin30°+(x-2)0-2.-数学
题目详情
计算下列各题
(1)2x
27x
+6x
4
3
x
(2)cos30°+sin45°-tan30°•tan60
(3)
27
-15
1
3
+
1
4
48
+
12
(4)
27
+2sin30°
+(x-2)
0
-2.
题型:解答题
难度:中档
来源:不详
答案
(1)原式=6x
3x
+4x
3x
=10x
3x
;
(2)原式=
3
2
+
2
2
-
3
3
•
3
=
3
2
+
2
2
-1;
(3)原式=3
3
-5
3
+
3
+2
3
=
3
;
(4)原式=3
3
+2×
class="stub"1
2
+1-2
=3
3
+1+1-2
=3
3
.
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题目简介
计算下列各题(1)2x27x+6x43x(2)cos30°+sin45°-tan30°•tan60(3)27-1513+1448+12(4)27+2sin30°+(x-2)0-2.-数学
题目详情
(1)2x
(2)cos30°+sin45°-tan30°•tan60
(3)
(4)
答案
=10x
(2)原式=
=
(3)原式=3
=
(4)原式=3
=3
=3