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2:09 5:15 So if I wanted to add together the above two vectors. So if I'm going to do three five plus minusMoreSo if I wanted to add together the above two vectors. So if I'm going to do three five plus minus two minus one you treat the top number and the bottom number separately. So writing it out in full.

10:50 12:48 So part a says find in terms of a and b the vector a to b. So we're gonna go backwards along three aMoreSo part a says find in terms of a and b the vector a to b. So we're gonna go backwards along three a minus b. So we're gonna have minus three a minus b. And then we've got plus five a plus three b.

7:19 25:26 Well I can go directly along here but I don't know that as a vector. So I have to go by the way likeMoreWell I can go directly along here but I don't know that as a vector. So I have to go by the way like I know about it's a to be. First. Then I go from B to C. And. Then I go from C to D.

→a+→0=→0+→a, ∴→0is the additive identity in vector addition. V. →a+(–→a)=–→a+→a=→0, ∴→ais the inverse in vector addition.

We can find the magnitude of a vector by finding the length of the line segment. We can identify the direction of a vector from the direction of the arrow on line segment that represents it.

Vectors are identified by magnitude, or the length of the line, and direction, represented by the arrowhead pointing toward the terminal point. The position vector has an initial point at (0,0) and is identified by its terminal point ⟨a,b⟩.