已知:向量a=(根号3sinx,cosx),向量b=(cosx,cosx),f(x)=2a·b+2m+1(x,m∈R)1.求关于f(x)的表达式,求出最小正周期2.若x∈[0,π/2]时,f(x)的最小值是5,求m的值注:根号3sin 中的根号是3的,sin并不
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![已知:向量a=(根号3sinx,cosx),向量b=(cosx,cosx),f(x)=2a·b+2m+1(x,m∈R)1.求关于f(x)的表达式,求出最小正周期2.若x∈[0,π/2]时,f(x)的最小值是5,求m的值注:根号3sin 中的根号是3的,sin并不](/uploads/image/z/616483-19-3.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%E5%90%91%E9%87%8Fa%3D%EF%BC%88%E6%A0%B9%E5%8F%B73sinx%2Ccosx%EF%BC%89%2C%E5%90%91%E9%87%8Fb%3D%EF%BC%88cosx%2Ccosx%EF%BC%89%2Cf%EF%BC%88x%EF%BC%89%3D2a%C2%B7b%2B2m%2B1%EF%BC%88x%2Cm%E2%88%88R%291.%E6%B1%82%E5%85%B3%E4%BA%8Ef%EF%BC%88x%EF%BC%89%E7%9A%84%E8%A1%A8%E8%BE%BE%E5%BC%8F%2C%E6%B1%82%E5%87%BA%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F2.%E8%8B%A5x%E2%88%88%5B0%2C%CF%80%2F2%5D%E6%97%B6%2Cf%EF%BC%88x%EF%BC%89%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AF5%2C%E6%B1%82m%E7%9A%84%E5%80%BC%E6%B3%A8%EF%BC%9A%E6%A0%B9%E5%8F%B73sin+%E4%B8%AD%E7%9A%84%E6%A0%B9%E5%8F%B7%E6%98%AF3%E7%9A%84%2Csin%E5%B9%B6%E4%B8%8D)
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