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
若向量a=(3,m),b=(2,-1),a.b=0,则实数的值为
在等比数列{a n}中,若a n>0且a 3a7 = 64,则a 5的值为
函数y=+的定义域为( )
函数, 则()
设全集U={1,2,3,4,5},集合M={1,4},N={1,3,5},则N∩(?UM)=( )