Pre Calculus

Question

Given the vectors, a = 3i + 4j, b = -2i + 5j, c = 10i -j, find a + (b - c) = ?

Answer 1

you can do this!!

 

the "i" (horizontal) components of vectors a, b & c are 3, -2 and 10, respectively. 

Do a + b - c with these three values, and get 3 + (-2) - (10) = 3 - 12 = -9.

 

The "j" (vertical) components of vectors a, b & c are 4, 5 & -1, respectively.

Do a + b - c with these three values, and get 4 + 5 - (-1) = 10.

 

Answer: -9i + 10j