已知函数f(x)=2sinx-x+k在区间[0,
题型: 填空题 难度: 一般
已知函数f(x)=2sinx-x+k在区间[0,
| π |
| 2 |
答案
∵函数f(x)=2sinx-x+k在区间[0,
| π |
| 2 |
∴f(x)′=2cosx-1,令f(x)′=0,
解得x=
| π |
| 3 |
∴f(x)的增区间为:[0,
| π |
| 3 |
f(x)的减区间为:[
| π |
| 3 |
| π |
| 2 |
∴
|
|
|
解得k∈(
| π |
| 3 |
|
|
3 |
| π |
| 2 |
故答案为(
| π |
| 3 |
|
|
3 |
| π |
| 2 |
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| 2 |
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3 |
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3 |
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