求函数y=2sinx(2x+π/3)(-π/6≤x≤π/6)的值域.怎么求,

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/26 06:50:42
求函数y=2sinx(2x+π/3)(-π/6≤x≤π/6)的值域.怎么求,求函数y=2sinx(2x+π/3)(-π/6≤x≤π/6)的值域.怎么求,求函数y=2sinx(2x+π/3)(-π/6≤

求函数y=2sinx(2x+π/3)(-π/6≤x≤π/6)的值域.怎么求,
求函数y=2sinx(2x+π/3)(-π/6≤x≤π/6)的值域.怎么求,

求函数y=2sinx(2x+π/3)(-π/6≤x≤π/6)的值域.怎么求,
∵-π/6≤x≤π/6
∴-π/3≤2x≤π/3
0≤2x+(π/3)≤2π/3
又2π/3=(π/2)+(π/6)
∴sin0=0,sin(π/2)=1
∴函数y=2sin(2x+π/3)的值域为[0,2]

你的题目可能有问题,应该是y=2sin(2x+π/3)
因为-π/6≤x≤π/6,所以-π/3≤2x≤π/3,所以0≤2x+π/3≤2π/3,所以2sinx(2x+π/3)值域[0,2]

∵ -π/6≤x≤π/6 ∴ - π/3≤2x≤π/3 0 ≤2x+π/3≤2π/3
∴ 0≤ sinx(2x+π/3 )≤√3/2 ∴ 0≤ 2sinx(2x+π/3 )≤√3/2 *2=√3
sin0=0 sinπ/2=1
∴ 0≤ y≤2