Given that P=(-1,8) and Q=(-2,1), find the component form and magnitude of the vector 3 PQ.
PQ = [(-2+1), (1-8)]
= [-1 , -7]
3PQ = [-3,-21) or -3i - 21j
magnitude = √(9 + 441) = √450
= 15√2
= [-1 , -7]
3PQ = [-3,-21) or -3i - 21j
magnitude = √(9 + 441) = √450
= 15√2