填在下面各正方形中的四个数之间都有相同的规律,根据此规律,m的值是( )
若数列an满足规律:a1>a2<a3>...<a2n-1>a2n<...,则称数列an为余弦数列,现将1,2,3,4,5排列成一个余弦数列的排法种数为( )
I'm not you. I admire what you did.