Question

dados os vetores a = (1,2) e b= ( 3, -1) determine:
a) |á| R: raiz de 5 R: ( 4,1 R:(2,4) R:(9,4)
b) á+b
c) 2a
d) 3a + 2b

Answer 1

a)
|a| = √(1² + 2²) = √(1 + 4) = √5

b)
a + b = (1, 2) + (3, -1) = (4, 1)

c)
2a = 2 * (1, 2) = (2, 4)

d)
3a + 2b = 3 * (1,2) + 2 * (3, -1) = (3, 6) + (6, -2) = (9, 4)