Question

Given: P(8, 4) and Q(-1, 9). Write the component form of vector PQ. Show all work.

Answer 1

PQ means the multiplication of P and Q

Answer 2

Questioner has stipulated that it means the vector from P to Q (often shown with a directional arrow on top), so that's fine.

Admittedly, questioner has not stipulated that P and Q are to be considered vectors rather than points, this can be inferred from the context.

Answer 3

PQ = OQ - OP = (-8,5) = -8i + 5j

Answer 4

OP is a vector from (0,0) to (8,4). or 8i+4j
OQ is a vector from (0,0) to (-1,9). or -i+9j
PQ= OQ-OP = (-i+9j) - (8i+4j) = (-9i+5j)

Answer 5

<-9,5>

Answer 6

thank you amistre:)

Answer 7

:)

Answer 8

"component" form is might be off; but thats how i read the question.

Answer 9

Dear amistre,, I need your guidance about programming. could u please help me?

Answer 10

yeah, component form includes the unit vectors

Answer 11

I wanna know which parts of math are moer important in CS?

Answer 12

discrete math usually (not always).

Answer 13

and other parts like game theory or geometry or ...

Answer 14

CS is computer science?

Answer 15

yes

Answer 16

the discrete stuff is good to know, and easy to program for; but all of the maths are important in CS, its mathmatical models that allow us to use and abuse the computers. I cant say for sure since I dont know what all CS entails tho

Answer 17

thanks a lot:)

Answer 18

youre welcome :) I find the more math I know, the easier I can make programs ....

Answer 19

that's amazing. i said -1 - 8 was -8. foolish.

Answer 20

:) typos happen

typing and mathing are two seperate brain functions and tend to get crossed