若函数f(x)=2asinxcosx-a*(根号2)*(sinx+cosx)+a+b的定义域为[0,派/2],值域为[-5,1],求a,b的值
kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
人气：428 ℃ 时间：2019-08-19 10:03:05
解答
f'(x)=2a[cos2x-cos(x+派/4)]
令f'(x)=0 =〉
x=派/4
又 f（0）=（1-根号2)a+b
=f(派/2)=（1-根号2)a+b
所以f(派/4)=1 f(0)=-5
或f(派/4)=-5 f(0)=1
解之a=6根号2+6 b=1
或a=--6根号2-6 b=-5
推荐
- 已知函数f(x)=sinx+cosx定义域为[a,b],值域为[-1,根号2],则b-a的取值范围是
- 为什么sinX+cosX的值域是[负根号2,根号2]?
- 根号下(1-cosx)/(1+cosx)乘以（根号下(1+sinx)+根号下(1-sinx) ）,x∈﹙π/2,π)的值域
- 若函数f(x)=2asinxcosx-√2a(sinx=cosx)+a+b的定义域为[0,π/2],值域为[-5,1],求a,b的值
- 已知函数f(x)＝sinx+cosx，(0≤x≤π2)，则f（x）的值域为 _ ．
- 一个圆锥形的沙堆,底面积是50.24平方米,高是3m,把这沙堆铺在一条宽4m的路上,若铺5cm厚,能铺多长?
- 急!把He isn't tall or short改为同义句
- 印度的地形主要是什么
猜你喜欢
