m∈{-2,-1,0,1,2,3},n∈{-2,-1,0,1,2,3,4},且方程x^2/m+y^2/n=1有意义,则方程x^2/m+y^2/n=1可以表示可以表示不同的双曲线的概率为( )A.2/3 B.13/30 C.8/15 D.7/15
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![m∈{-2,-1,0,1,2,3},n∈{-2,-1,0,1,2,3,4},且方程x^2/m+y^2/n=1有意义,则方程x^2/m+y^2/n=1可以表示可以表示不同的双曲线的概率为( )A.2/3 B.13/30 C.8/15 D.7/15](/uploads/image/z/11007425-65-5.jpg?t=m%E2%88%88%7B-2%2C-1%2C0%2C1%2C2%2C3%7D%2Cn%E2%88%88%7B-2%2C-1%2C0%2C1%2C2%2C3%2C4%7D%2C%E4%B8%94%E6%96%B9%E7%A8%8Bx%5E2%2Fm%2By%5E2%2Fn%3D1%E6%9C%89%E6%84%8F%E4%B9%89%2C%E5%88%99%E6%96%B9%E7%A8%8Bx%5E2%2Fm%2By%5E2%2Fn%3D1%E5%8F%AF%E4%BB%A5%E8%A1%A8%E7%A4%BA%E5%8F%AF%E4%BB%A5%E8%A1%A8%E7%A4%BA%E4%B8%8D%E5%90%8C%E7%9A%84%E5%8F%8C%E6%9B%B2%E7%BA%BF%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA%EF%BC%88+++++%EF%BC%89A.2%2F3++++B.13%2F30++++C.8%2F15++++D.7%2F15)
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