已知函数f(x)=Asin(2x+π/4)+B(A>0)的最大值为2,最小值为0,求f(5π/24)的值
将函数y=f(x)图像向右平移π/4个单位后,再将图像上所有点的纵坐标扩大到原来的根号2倍,横坐标不变,得到函数y=g(x)的图像,求方程g(x)=1的解...
将函数y=f(x)图像向右平移π/4个单位后,再将图像上所有点的纵坐标扩大到原来的根号2倍,横坐标不变,得到函数y=g(x)的图像,求方程g(x)=1的解
展开
1个回答
展开全部
A+B=2 B-A=0 联立得:B=1 A=1
函数为:f(x)= f(x)=sin(2x+π/4)+1
f(5π/24)=sin(5π/12+π/4)+1
=sin(2π/3)+1
=sin(π-π/3)+1
=1+√3/2
g(x)=√2{sin[2(x-π/4)+π/4]+1}
=√2[sin(2x-π/4)+1]
√2[sin(2x-π/4)+1]=1
sin(2x-π/4)=√2/2-1
2x-π/4=arcsin(√2/2-1)
x=arcsin(√2/2-1)/2+π/8
函数为:f(x)= f(x)=sin(2x+π/4)+1
f(5π/24)=sin(5π/12+π/4)+1
=sin(2π/3)+1
=sin(π-π/3)+1
=1+√3/2
g(x)=√2{sin[2(x-π/4)+π/4]+1}
=√2[sin(2x-π/4)+1]
√2[sin(2x-π/4)+1]=1
sin(2x-π/4)=√2/2-1
2x-π/4=arcsin(√2/2-1)
x=arcsin(√2/2-1)/2+π/8
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询