设向量[tex=0.714x0.786]x0LwgGwm5PYGhm6jtdZHxw==[/tex]垂直于[tex=4.643x1.357]ZW64+J9P78X4zs8vMnPmuOQDXVqXz+FDMwy/cbB0nj8=[/tex]和[tex=5.286x1.357]X8rtY/bflg34HDdmzhzUZlwlc4L1DMlAmCfkW8sQE/g=[/tex],并且与[tex=4.5x1.357]lfPUbrdP11Eu7MC1Nn7/Zua6ZRcI1HqwOc60UXIbqos=[/tex]的数量积为-10,求向量[tex=0.714x0.786]x0LwgGwm5PYGhm6jtdZHxw==[/tex].
举一反三
- 若要将一个长度为N=16的序列x(n)重新位倒序,作为某一FFT算法的输入,则位倒序后序列的样本序号为( )。 A: x(15), x(14), x(13), x(12), x(11), x(10), x(9), x(8), x(7), x(6),<br/>x(5), x(4), x(3), x(2), x(1), x(0) B: x(0), x(4), x(2), x(6), x(1), x(5), x(3), x(7), x(8), x(12), x(10),<br/>x(14), x(9), x(13), x(11), x(15) C: x(0), x(2), x(4), x(6), x(8), x(10), x(12), x(14), x(1), x(3), x(5),<br/>x(7), x(9), x(11), x(13), x(15) D: x(0), x(8), x(4), x(12), x(2), x(10), x(6), x(14), x(1), x(9), x(5),<br/>x(13), x(3), x(11), x(7), x(15)
- 已知3阶矩阵A与3维列向量 x 满足[tex=6.857x1.357]zd0nq0IiNsY0hFTyLJHQy4eC+A8zUY14VqChcVve0aM=[/tex],且向量组[tex=0.714x0.786]Qp78QkdFrqytlOsANWrP9w==[/tex],[tex=3.5x1.429]c2YtesCJSYo0KOSy0rMECg==[/tex] (1)记[tex=10.643x1.357]3tyZrBE07WCx0ZFK2Y3aVjbjYUrJ/5Q0lIjkUE1dgc8=[/tex],求三阶矩阵B,使AP= PB;(2)求[tex=1.357x1.357]0awZUhfhOcjHk6LSkdT6Gw==[/tex]
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- 求平行于向量 [tex=5.429x1.357]x/6iEXip+O1XKxx+AJCEK+iJDnwWTs6vrfapGMpSAys=[/tex] 的单位向量.
- 以下创建数组的方式错误的是() A: shortx[];x={1,2,3,4,5,6}; B: shortx[]=newshort[6];x[0]=9;x[1]=8;x[2]=7;x[3]=6;x[4]=5;x[5]=4; C: shortx[]=newshort[6];intlen=x.length;for(inti=0;i