q = (2.2, 3.6)T r = (-4.8, -2.2)T s = q + r
As expected, | s | is less than | q | + | r |.
Three dimensional vectors have length. The formula is about the same. The length of a vector represented by a three-component matrix is:
For example:
| (1, 2, 3)T | = ( 12 + 22 + 32 ) = ( 1 + 4 + 9 ) = 14 = 3.742
What is the length of (-1, -2, 3)T