1 已知函数f(x)=2sin(ωx+ψ)对任意x都有f(π/6+x)=f(π/6-x).则f(π/6)=2 y=cosxtanx的值域是3对于x∈R,3/2x²sinθ+2xcosθ+1>0恒成立,0≤θ<2π,求θ的取值范围4已知函数f(x)=ax²+bx+1(a,b为实数).x∈R,F(X)=f(
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![1 已知函数f(x)=2sin(ωx+ψ)对任意x都有f(π/6+x)=f(π/6-x).则f(π/6)=2 y=cosxtanx的值域是3对于x∈R,3/2x²sinθ+2xcosθ+1>0恒成立,0≤θ<2π,求θ的取值范围4已知函数f(x)=ax²+bx+1(a,b为实数).x∈R,F(X)=f(](/uploads/image/z/2684540-20-0.jpg?t=1+%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%EF%BC%89%3D2sin%28%CF%89x%2B%CF%88%29%E5%AF%B9%E4%BB%BB%E6%84%8Fx%E9%83%BD%E6%9C%89f%28%CF%80%2F6%2Bx%29%3Df%28%CF%80%2F6-x%29.%E5%88%99f%28%CF%80%2F6%29%3D2+y%3Dcosxtanx%E7%9A%84%E5%80%BC%E5%9F%9F%E6%98%AF3%E5%AF%B9%E4%BA%8Ex%E2%88%88R%2C3%2F2x%26sup2%3Bsin%CE%B8%2B2xcos%CE%B8%2B1%EF%BC%9E0%E6%81%92%E6%88%90%E7%AB%8B%2C0%E2%89%A4%CE%B8%EF%BC%9C2%CF%80%2C%E6%B1%82%CE%B8%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B44%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dax%26sup2%3B%2Bbx%2B1%28a%2Cb%E4%B8%BA%E5%AE%9E%E6%95%B0%EF%BC%89.x%E2%88%88R%2CF%28X%29%3Df%28)
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