A unit vector parallel to vector (2,-3,6) is vector?答案选（-0.29,0.43,-0.86）

A unit vector parallel to vector (2,-3,6) is vector?答案选（-0.29,0.43,-0.86） is the vector a=i+2J-2ka veit vector?if not find the unit vector having the same direction as a? is the vector a=i+2J-2ka veit vector?if not find the unit vector having the same direction as a?字母上面是向量~ vector a = new vector(50);是什么意思 空间向量问题,其实不复杂,但我答案总是不对.Find a unit vector in the空间向量问题,其实不复杂,但我答案总是不对.Find a unit vector in the same direction of || a x b|| given that a = (1,-2,3) and b = (3,2,-1) 下列每个 vector 对象中元素个数是多少?各元素的值 是什么?(a) vector ivec1;(b) vector ivec2(10);(c) vector ivec3(10,42);(d) vector svec1;(e) vector svec2(10);(f) vector svec3(10,hello); 坐等Prove:If V is a partially ordered vector space with order unit I,a state p of V is pure if and only if each positive functional t on V such that t 英语翻译What is the physical relation between any two points inside the velocity vector-space?Find a unit vector which points directly halfway between the directions of the two vectors A=5X - 3Y and B=4X -7Y +5Z . 英语翻译denote the unit vector n of S as the normal direction from medium 1 to medium 2 and take the surface integral in maxwell'equations over the closed surface of a small cylinder a large unit翻译 c++ vectorb(a[0].size(),vector(a.size())) 请指教 unit unit Unit 3 A rainy weekend money as a unit of 是a unit of 还是an unit of 为什么 _____ is a little difficult.A.Unit fifth B.The unit fifth C.Five unit D.The fifth unit __is very difficult.A Unit fifth B The fifth unit C Five Unit D The unit fifth选几为什么? _______ is very difficult.A.Unit fifthB.The unit fifthC.Five unitD.The fifth unit