求下列函数的值域 (1)y=3sin(2x+π/2)-1 (x∈[-π/4,π/3]) (2)y=(cosx)^2-3cosx+1 (3)y=(cosx)^2-2cosx+1
求下列函数的值域(1)y=3sin(2x+π/2)-1(x∈[-π/4,π/3])(2)y=(cosx)^2-3cosx+1(3)y=(cosx)^2-2cosx+1（x...
求下列函数的值域 (1)y=3sin(2x+π/2)-1 (x∈[-π/4,π/3])
(2)y=(cosx)^2-3cosx+1 (3)y=(cosx)^2-2cosx+1 （x∈[-π/4,π/3]) 展开
(2)y=(cosx)^2-3cosx+1 (3)y=(cosx)^2-2cosx+1 （x∈[-π/4,π/3]) 展开
展开全部
1.y=-3cos2x-1
-pai/2<=2x<=2pai/3
-1/2<=cos2x<=1
-4<=y<=1/2
2.y=(cosx-3/2)^2-5/4
-1<=cosx<=1
-1<=y<=5
3.y=(cosx-1)^2
1/2<=cosx<=1
0<=y<=1/4
-pai/2<=2x<=2pai/3
-1/2<=cos2x<=1
-4<=y<=1/2
2.y=(cosx-3/2)^2-5/4
-1<=cosx<=1
-1<=y<=5
3.y=(cosx-1)^2
1/2<=cosx<=1
0<=y<=1/4
本回答由提问者推荐
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
