Alexis1994_13
when 2 vectors are parallel what we have ?
I mean vector AB//BC= ?
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amistre64
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we have 2 vectors the differ by at most a scalar
Alexis1994_13
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AB*BC=0 ?
amistre64
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does dotting parallel vectors produce a 0? they aint orthogonal that I can recall
amistre64
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0,1
0,1
----
0+1 = 1
0,1
0,-1
----
0-1 = -1
amistre64
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3 , 4
-3,-4
-----
-9-12 = -18
Alexis1994_13
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AB+BC=-1 ?
amistre64
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adding vectors produces another vector, not a scalar
amistre64
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youre gonna have to provide more verbiage if I am to understand what it is your asking :)
amistre64
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that and 4.-4 = -16 ... not -12 lol
Alexis1994_13
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I have the vectors AB(2,6) and BC(2K-2 , 5K-4)
And I need to prove that those vectors are parallel. How I will do that?
Alexis1994_13
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I mean,I need to find fot wich k those vectors are parallel.
amistre64
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when they differ by only a scalar; by a multiplicative factor.
2 = 2k-2
and
6 = 5k-4
estudier
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You could test values of k--
amistre64
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4 = 2k; k=2
10 = 5k; k=2
right? so when k=2; that is one possible option for parallel
Alexis1994_13
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then we have AB//BC <=> AB = BC
amistre64
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when ab = bc; they are parallel; but thats not the only case ...
amistre64
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if you can determine the angle that the vectors span from each other; then you can prove if they are parallel or not as well :)
180 and 0 are parallel vectors
estudier
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normal to one is normal to the other...
Alexis1994_13
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okay,I got it :D
Thank ya a lot.
amistre64
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2 , 6
2k-2, 5k-4
-----------
4k-4 + 30k-24 = 34k -28 ..... :)