Given that P=(-1,8) and Q=(-2,1), find the component form and magnitude of the vector 3 PQ.

1 answer

write the vector pq as q-p= -2i+j+i-8j= -i-7j

3pq= -3i-21j
magnitude = square root of(9+441)=15*square root of 2

componentform -3/15*square root of 2i
-21/15*square root of 2j