设函数f(x)=x^3+x,若当0≤θ≤π/2时,f(msinθ)+f(sinθ-cosθ^2+2)>0恒成立,则实数m的取值范围是A.(-3,+∞) B.(-1,+∞) C.(-∞,-3) D.(-∞,-1)
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![设函数f(x)=x^3+x,若当0≤θ≤π/2时,f(msinθ)+f(sinθ-cosθ^2+2)>0恒成立,则实数m的取值范围是A.(-3,+∞) B.(-1,+∞) C.(-∞,-3) D.(-∞,-1)](/uploads/image/z/3000450-66-0.jpg?t=%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%3Dx%5E3%2Bx%2C%E8%8B%A5%E5%BD%930%E2%89%A4%CE%B8%E2%89%A4%CF%80%2F2%E6%97%B6%2Cf%28msin%CE%B8%29%2Bf%28sin%CE%B8-cos%CE%B8%5E2%2B2%29%3E0%E6%81%92%E6%88%90%E7%AB%8B%2C%E5%88%99%E5%AE%9E%E6%95%B0m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AFA.%28-3%2C%2B%E2%88%9E%29+B.%28-1%2C%2B%E2%88%9E%29+C.%28-%E2%88%9E%2C-3%29+D.%28-%E2%88%9E%2C-1%29)
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