问题
解答题
计算: (1)
(2)计算:cos60°+
|
答案
(1)原式=2
-2×3
-(3 2
+2)5
=2
-3
-3
-25
=
-3
-2;5
(2)原式=
+1 2
-22
-2 1 2
=-
.2
计算: (1)
(2)计算:cos60°+
|
(1)原式=2
-2×3
-(3 2
+2)5
=2
-3
-3
-25
=
-3
-2;5
(2)原式=
+1 2
-22
-2 1 2
=-
.2