Question

Find the specified vector or scalar.

u = -4i + 1j and v = 4i + 1j; Find ‖u+v‖

Answer 1

show your attempt at solving this problem

Answer 2

\(\bf u = -4i + 1j\implies <-4,1>\qquad v = 4i + 1j\implies <4,1>
\\ \quad \\
u+v\implies <a,b>+<c,d>\implies <a+c,b+d>
\\ \quad \\
||<a+c,b+d>||\implies \sqrt{(a+c)^2+(b+d)^2}\)

Answer 3

thanks, Master K Doe
I was asking the person who posted this problem to see where the fault in learning and perhaps start from there

Answer 4

No need to, I see that I was WAY off.
Where do a,b,c, and d come from?
Are A and B supposed to be 4i? o.o I'm confused with the letter plotting...

My fault in my learning was that I used Pythagorean theorem and stopped there

Answer 5

http://theory.uwinnipeg.ca/physics/twodim/node2.html

Answer 6

Are you saying that the coefficients are A,B,C, and D?