vectors 1 find the vector which starts at (3,4) and ends at (5,1). also find its length 2 find the vector which starts at (4,-2,3) and ends at (-3,5,1). also find its length. 3 For ?u = (2,1) and ?v = (4,-2), find a) ?u+?v b) ?u??v c) ?2?u d) 2?u+3?v e) 0.5?v 4 For ?u = (-2,-5,1) and ?v = (3,5,-2), find a) ?u+?v b) ?u??v c) ?2?u d) 2?u+3?v e) 0.5?v