设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},则X与Y的关系是A.X属于Y B.Y属于X C.X=Y D.X∩Y={(
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![设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},则X与Y的关系是A.X属于Y B.Y属于X C.X=Y D.X∩Y={(](/uploads/image/z/4472405-53-5.jpg?t=%E8%AE%BE%E9%9B%86%E5%90%88X%3D%7Bx%7Cx%3D%EF%BC%887%2F9%EF%BC%89%CF%80%2B2k%CF%80%E6%88%96x%3D%EF%BC%8811%2F9%EF%BC%89%CF%80%2B2k%CF%80%2Ck%E2%88%88Z%7D%2CY%3D%7By%7Cy%3D%EF%BC%88%C2%B17%2F9%EF%BC%89%CF%80%2B2k%CF%80%2Ck%E2%88%88Z%7D%2C%E8%AE%BE%E9%9B%86%E5%90%88X%3D%7Bx%7Cx%3D%EF%BC%887%2F9%EF%BC%89%CF%80%2B2k%CF%80%E6%88%96x%3D%EF%BC%8811%2F9%EF%BC%89%CF%80%2B2k%CF%80%2Ck%E2%88%88Z%7D%2CY%3D%7By%7Cy%3D%EF%BC%88%C2%B17%2F9%EF%BC%89%CF%80%2B2k%CF%80%2Ck%E2%88%88Z%7D%2C%E5%88%99X%E4%B8%8EY%E7%9A%84%E5%85%B3%E7%B3%BB%E6%98%AFA.X%E5%B1%9E%E4%BA%8EY+B.Y%E5%B1%9E%E4%BA%8EX+C.X%3DY+D.X%E2%88%A9Y%3D%7B%EF%BC%88)
设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},则X与Y的关系是A.X属于Y B.Y属于X C.X=Y D.X∩Y={(
设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},
设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},则X与Y的关系是
A.X属于Y B.Y属于X C.X=Y D.X∩Y={(7/9)π}
设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},设集合X={x|x=(7/9)π+2kπ或x=(11/9)π+2kπ,k∈Z},Y={y|y=(±7/9)π+2kπ,k∈Z},则X与Y的关系是A.X属于Y B.Y属于X C.X=Y D.X∩Y={(
等效于X={x|x=(7/9)π+2kπ或x=(11/9)π -2π+2kπ,k∈Z}
即:X={x|x=(7/9)π+2kπ或x=(-7/9)π+2kπ,k∈Z}
所以 选 C
SAD
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