Ahyperbola(双曲线)wjthvertices(顶点)(-2,5)and(-2,-3),has an asynptote(渐近线)that passes the point(2.5) Then an equarionk of the hyperbola is
函数的最小值是( )
定义运算,若,则等于()
已知数列满足,若,则=( )
若正数,满足,则的最小值是()
等比数列的各项均为正数,且则()