设全集U=R,A=:{x-2/x+1<0},B=:{X|sinx≥根号3/2},则A∩B=?集合A 的取值范围是-1<x<2集合B的取值范围是π/3+2kπ≤x≤2π/3+2kπ.A∩B应等于π/3≤x≤2π/3 为什么答案上写着π/3≤x<2.2是2π啊、应取2π/3 ,为
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![设全集U=R,A=:{x-2/x+1<0},B=:{X|sinx≥根号3/2},则A∩B=?集合A 的取值范围是-1<x<2集合B的取值范围是π/3+2kπ≤x≤2π/3+2kπ.A∩B应等于π/3≤x≤2π/3 为什么答案上写着π/3≤x<2.2是2π啊、应取2π/3 ,为](/uploads/image/z/2465615-47-5.jpg?t=%E8%AE%BE%E5%85%A8%E9%9B%86U%3DR%2CA%3D%3A%7Bx-2%2Fx%2B1%EF%BC%9C0%7D%2CB%3D%3A%7BX%7Csinx%E2%89%A5%E6%A0%B9%E5%8F%B73%2F2%7D%2C%E5%88%99A%E2%88%A9B%3D%3F%E9%9B%86%E5%90%88A+%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF-1%EF%BC%9Cx%EF%BC%9C2%E9%9B%86%E5%90%88B%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%CF%80%2F3%2B2k%CF%80%E2%89%A4x%E2%89%A42%CF%80%2F3%2B2k%CF%80.A%E2%88%A9B%E5%BA%94%E7%AD%89%E4%BA%8E%CF%80%2F3%E2%89%A4x%E2%89%A42%CF%80%2F3+%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AD%94%E6%A1%88%E4%B8%8A%E5%86%99%E7%9D%80%CF%80%2F3%E2%89%A4x%EF%BC%9C2.2%E6%98%AF2%CF%80%E5%95%8A%E3%80%81%E5%BA%94%E5%8F%962%CF%80%2F3+%2C%E4%B8%BA)
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设全集U=R,A=:{x-2/x+1<0},B=:{X|sinx≥根号3/2},则A∩B=?集合A 的取值范围是-1<x<2集合B的取值范围是π/3+2kπ≤x≤2π/3+2kπ.A∩B应等于π/3≤x≤2π/3 为什么答案上写着π/3≤x<2.2是2π啊、应取2π/3 ,为
设全集U=R,A=:{x-2/x+1<0},B=:{X|sinx≥根号3/2},则A∩B=?
集合A 的取值范围是-1<x<2
集合B的取值范围是π/3+2kπ≤x≤2π/3+2kπ.A∩B应等于π/3≤x≤2π/3
为什么答案上写着π/3≤x<2.
2是2π啊、应取2π/3 ,为什么是2?
设全集U=R,A=:{x-2/x+1<0},B=:{X|sinx≥根号3/2},则A∩B=?集合A 的取值范围是-1<x<2集合B的取值范围是π/3+2kπ≤x≤2π/3+2kπ.A∩B应等于π/3≤x≤2π/3 为什么答案上写着π/3≤x<2.2是2π啊、应取2π/3 ,为
1=180°/π
π=3.14
所以2≈114°
2π/3=120°
2π/3大于2了,这个时候2π/3不满足A的条件
2π显然大2,画一个数轴就可以了
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