已知f(x)-sin(ωx+π/3)(ω>0),f(π/6)-f(π/3),且f(x)在区间(π/6,π/3)有最小值,无最大值,则ω=_______.
14/3。解析:由f(π/6)=f(π/3),知f(x)的图像关于x=π/4:对称,且在x=π/4处有最小值,所以(π/4)ω+π/3=2kπ-π/2,有ω=8k-10/3(k∈Z),又因为(1/2)T=π/ω>π/3-π/6=π/6,所以ω<6,故k=1,ω=14/3.
已知f(x)-sin(ωx+π/3)(ω>0),f(π/6)-f(π/3),且f(x)在区间(π/6,π/3)有最小值,无最大值,则ω=_______.
14/3。解析:由f(π/6)=f(π/3),知f(x)的图像关于x=π/4:对称,且在x=π/4处有最小值,所以(π/4)ω+π/3=2kπ-π/2,有ω=8k-10/3(k∈Z),又因为(1/2)T=π/ω>π/3-π/6=π/6,所以ω<6,故k=1,ω=14/3.