题目内容
(1)计算:sin60°•cot30°-
cos45°+
(π-
)0+tan45°
(2)解方程:3x2-4x+1=0.
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(2)解方程:3x2-4x+1=0.
(1)原式=
•
-
•
+
×1+1
=
-1+
+1
=2;
(2)∵(3x-1)(x-1)=0,
∴3x-1=0或x-1=0,
∴x1=
,x2=1.
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| 2 |
| 3 |
| 2 |
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| 2 |
| 1 |
| 2 |
=
| 3 |
| 2 |
| 1 |
| 2 |
=2;
(2)∵(3x-1)(x-1)=0,
∴3x-1=0或x-1=0,
∴x1=
| 1 |
| 3 |
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