问题
解答题
(1)计算:sin60°•cot30°-
(2)解方程:3x2-4x+1=0. |
答案
(1)原式=
•3 2
-3
•2
+2 2
×1+11 2
=
-1+3 2
+11 2
=2;
(2)∵(3x-1)(x-1)=0,
∴3x-1=0或x-1=0,
∴x1=
,x2=1.1 3
(1)计算:sin60°•cot30°-
(2)解方程:3x2-4x+1=0. |
(1)原式=
•3 2
-3
•2
+2 2
×1+11 2
=
-1+3 2
+11 2
=2;
(2)∵(3x-1)(x-1)=0,
∴3x-1=0或x-1=0,
∴x1=
,x2=1.1 3