108.函数f(x)=xcos2x在区间[0,2π]上的零点个数为( ) A、2\x09B、3\x09C、4108.函数f(x)=xcos2x在区间[0,2π]上的零点个数为( )A、2\x09B、3\x09C、4\x09D、5
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![108.函数f(x)=xcos2x在区间[0,2π]上的零点个数为( ) A、2\x09B、3\x09C、4108.函数f(x)=xcos2x在区间[0,2π]上的零点个数为( )A、2\x09B、3\x09C、4\x09D、5](/uploads/image/z/2624757-69-7.jpg?t=108%EF%BC%8E%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Dxcos2x%E5%9C%A8%E5%8C%BA%E9%97%B4%5B0%2C2%CF%80%5D%E4%B8%8A%E7%9A%84%E9%9B%B6%E7%82%B9%E4%B8%AA%E6%95%B0%E4%B8%BA%EF%BC%88%E3%80%80%E3%80%80%EF%BC%89+A%E3%80%812%5Cx09B%E3%80%813%5Cx09C%E3%80%814108%EF%BC%8E%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Dxcos2x%E5%9C%A8%E5%8C%BA%E9%97%B4%5B0%2C2%CF%80%5D%E4%B8%8A%E7%9A%84%E9%9B%B6%E7%82%B9%E4%B8%AA%E6%95%B0%E4%B8%BA%EF%BC%88%E3%80%80%E3%80%80%EF%BC%89A%E3%80%812%5Cx09B%E3%80%813%5Cx09C%E3%80%814%5Cx09D%E3%80%815)
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