Mathematics
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OpenStudy (lovelyharmonics):
magnitude?
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OpenStudy (lovelyharmonics):
@ikram002p
OpenStudy (lovelyharmonics):
given that P=(-5,5) and Q=(-13,6) find the component form and the magnitude of |dw:1403216131663:dw|
OpenStudy (ikram002p):
|dw:1403216203511:dw|
OpenStudy (ikram002p):
u wanna for PQ ? or 2 PQ ?
OpenStudy (lovelyharmonics):
it says 2pq
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OpenStudy (ikram002p):
ok :D
then simply find PQ and multiply by 2
OpenStudy (ikram002p):
if u have two point P (x1,y1) ,Q (x2,y2)
the component form for vector PQ is devined by <x2-x1 , y2-y1 >
OpenStudy (lovelyharmonics):
so i just multiply both of the points by 2? .-.
OpenStudy (ikram002p):
u have
PQ=<x2-x1 , y2-y1 >
2PQ=2<x2-x1 , y2-y1 >
2PQ=<2(x2-x1) , 2(y2-y1 )>
OpenStudy (lovelyharmonics):
oh so its -5+13=8 and 5-6=-1 and then i multiply it by 2? 2(8,-1)=16,-2?
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OpenStudy (ikram002p):
dont forget the vector end at point Q not P
OpenStudy (lovelyharmonics):
wait what .-.
OpenStudy (ikram002p):
it should be
-13+5 and 6-5
for component the direction is important
OpenStudy (lovelyharmonics):
im so confused .-. is it sqrt65?
OpenStudy (ikram002p):
wait first find component
PQ=<-8,1 >
ok ?
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OpenStudy (lovelyharmonics):
well i know its sqrt65 XD cuz only one answer has 16,-2
OpenStudy (ikram002p):
and
2PQ=<-16,2>
OpenStudy (ikram002p):
magnitude = sqrt [(16)^2 +2^2]=sqrt 260
OpenStudy (lovelyharmonics):
well then the answer has to be -16,2 instead of 16,-2
OpenStudy (ikram002p):
yes lol i told u that ealier T_T
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OpenStudy (lovelyharmonics):
oh c: i never noticed that XD i sowwy
OpenStudy (ikram002p):
naaaa its ok :P