/sci/ - Science & Math

Normal multiplication? Just take the constant and stick it in front of each component in the vector.

Also know your rules of vector multiplication. What's the result of a dot product? What is a scalar times a vector (read the first part)?

what you don't understand is how to think forward. you are stuck with vectors. the dot product gives you a scalar, there is no problem. stop wasting our time and work out a finite, self-made example for yourself next time you get stuck. you can easily write yourself up a made up 2D vector. ugh pay me

>>8337442
wow, thanks! your attitude is so helpful to this world. people should pay you for it, i agree

Its:

(<0,2,1> (DOT) <-3,5,4>)(<0,2,1>)

After the DOT product

(<0,10,4>)(<0,2,1>)

There is no DOT or CROSS operator between the two vectors. How do i perform this operation?

>>8337469
>I know how to dot product vectors
good thread OP

>>8337469
You don't know the definition of the dot product

http://physics.info/vector-multiplication/

>>8337431
It's pretty simple, anon.
Dot products get you scalar quantities, which can be multiplied by vectors, and you end up with vector with a bigger (or smaller/opposite) magnitude, depending on the scalar quantity.
Just don't get confused between dot and cross products as multiplication.

>>8337469
Dot product results in a scalar.
[eqn]\vec{v} \dot \vec{w} = \sum_{k=1}^{n} \vec{v}_k \vec{w}_k[/eqn]
This means that after you complete the dot product, the scalar acting on the last vector simply multiplies each entry by whatever value it is.

>>8337431
That is scalar multiplication you brainlet.

>>8337453
Quit being a bitch. Read the fucking sticky.