Find the specified vector or scalar.

u = -4i + 1j and v = 4i + 1j; Find ‖u+v‖.
A. √34
B. 8
C. 2
D. 5

Question

Find the specified vector or scalar.

u = -4i + 1j and v = 4i + 1j; Find ‖u+v‖.
A. √34	
B. 8	
C. 2	
D. 5

yacoub1993 · Answer

@amistre64 Help Please

amistre64 · Answer

les start by adding the vectors;  combine like terms

yacoub1993 · Answer

i have no idea how to do these kind of math
Can you help me out with it

amistre64 · Answer

u = -4i + 1j   and   v = 4i + 1j

u+v = -4i + 1j + 4i + 1j

lets start .... by combining like terms

yacoub1993 · Answer

u+v = -4i +4i + 2j

yacoub1993 · Answer

is it like this

amistre64 · Answer

thats part of it ... now combine the i parts

yacoub1993 · Answer

if i add -4j to 4 it will be 0j

amistre64 · Answer

alittle bit of typos there ... it might help to consider that ij is a generic notation and can simply be restated as xy

u+v = -4x +4x + 2y

this is a suitable rendition;

u+v = 0x + 2y

amistre64 · Answer

now the question is asking:  how long is this vector?  or rather, how far is (0,2) from the origin?

yacoub1993 · Answer

ohh i get it

amistre64 · Answer

it is pretty basic once you know the notation :)