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Vector maths help!
NEO | 
Macedonia ElGanchoK1NG 
Find vector c colinear with vectors a+b if a*b=5, c*b=18 and | b |=2. Write the vector as a linear combination from vectors a and b. Sorry about the translation its roughly translated. Ps Above a,b,c there are arrows like normal vectors have
2019-07-12 16:10
Ok
2019-07-12 16:13
+1
2019-07-12 16:41
yall mickey mouse lookin ass what with yo goddamn light up sketchers like bigass clown shoes and yo damn hands bein puffed up by severe leprosy n shit, goddamn.
2019-07-12 18:20
#2
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Peru TheJuan 
Ok
2019-07-12 16:14
#3
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Canada NELK 
Ok
2019-07-12 16:15
#4
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United Kingdom zaidinator7 
Dot product mens
2019-07-12 16:16
#5
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United Kingdom zaidinator7 
Sorry I have forgotten A level math despite A* . Go wolfram alpha, Khan academy idk
2019-07-12 16:16
I know the answer, like all 200iq hltv users do, but I refuse to help you)
2019-07-12 16:17
damn mens im only 199 iq (((
2019-07-12 16:59
I remember those were really easy if you know the formula which is easy as well. I would tell you if I wasnt at the gym, because I have it somewhere in my exercise book. But I really dont remember rn, it was a long time ago. If you still wont have an answer in like 1 hour then PM me
2019-07-12 16:19
It isnt for me mens, if u find the answer sometimes send it to me.. i have time until next week
2019-07-12 16:20
Oh then ezpz, ill pm you the answer when im home.
2019-07-12 16:21
Ok mens thanks
2019-07-12 16:34
the answer is 5
2019-07-12 16:17
Every basic math problem is explained on YT. Stop asking us to do your homework.
2019-07-12 16:18
#12
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Lithuania Andy_2 
MATHS IN SUMMER OMEGALUL
2019-07-12 16:22
#13
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Turkey mustim 
Do the lines with the b represent magnitude? Haven’t done vectors in 4 years?
2019-07-12 16:22
Yes
2019-07-12 16:28
#17
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Turkey mustim 
I’ve never done cross products. I’m assuming you have to do cross products since vector c is a vector, which means the answer is a vector and not a scalar, which would be figured out us8ng the dot product. Is this university work? I never did this at school.
2019-07-12 16:37
c=2a+2b
2019-07-12 16:34
a*b=5 c*b=18 |b|=2 a*b =|a|*|b|* cos(0) 5 = |a|* 2 * 1 |a|= 5/2 c*b =|c|*|b|* cos(0) 18 = |c|* 2 * 1 |c|= 9 9 = (5/2)x + 2y , x, y element Z x = 2 y = 2 c = 2a + 2b
2019-07-12 16:40
#22
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Turkey mustim 
I thought it was sin 90.
2019-07-12 16:42
use 'cos' for this formula. co-linear means parallel therefore the angle is 0, and thus cos(0) = 1
2019-07-12 16:45
#24
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Turkey mustim 
Ah. Serves me right for trying to learn something new just by looking at a question and a formula. Well done mate!
2019-07-12 16:47
Unless this is cross product instead of dot product in which case I would be wrong xd
2019-07-12 16:52
it looks like the products are just magnitude, i feel like it should be dot product
2019-07-12 16:57
#34
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Turkey mustim 
I assumed it was cross product because it says vector c, which implies the answer is a vector, eliminating dot product as a possibility. I wouldn’t know though, I literally just searched it on google and try to solve from there. I assume you are more confident, so I have faith in your answer.
2019-07-12 16:58
The question wants the answer written as a linear combination of vectors a and b, therefore no specific values of i, j and k are required.
2019-07-12 17:01
#38
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Turkey mustim 
Yeah your answer is correct. Sin0 (because they are collinear) would be 0. You wouldn’t get a result through cross product.
2019-07-12 17:14
Thank you for ur help!
2019-07-12 16:59
#20
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Turkey mustim 
How did you do it?
2019-07-12 16:41
#21
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Turkey mustim 
Never mind, just saw. Awesome.
2019-07-12 16:41
#25
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Germany Ezekiel23!20 
use wolfram alpha, wtf m8.
2019-07-12 16:48
#26
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Kyrgyzstan CheeLongQua 
a*b=5 vector product or dot product?
2019-07-12 16:48
How the fuck would it be a vector product if the result is a scalar?
2019-07-12 16:51
#28
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Kyrgyzstan CheeLongQua 
jesus christ i am retarded
2019-07-12 16:51
no worries mate I was wondering if I was overlooking something
2019-07-12 16:54
#29
Xyp9x | 
Ukraine 60hzgods 
Do you saw any vector that only consists a number ?
2019-07-12 16:52
def destroy(Hodor){ } def TABLE[( dog )][i] { if(68 - --( Sansa + rule(x,ROWS) ) - destroy() + COLS){ x += ( ( COLS ) ); Jon; if(-( TABLE[1][-TABLE[( -x )][( Sansa )]] )){ -1; ( destroy(ROWS) ) } else { if(( -47 )){ if(Ygritte){ dog += bar(foo(( -1 ))); Sansa -= -bar(-0.84,destroy(),destroy(TABLE[( TABLE[Jon - foo(-Sansa / 1) - 82][( TABLE[--( -0.47 )][Jon] )] )][COLS],-0.81)); if(Arya - -TABLE[-Hodor][foo(foo(-x),( -0.55 ),--( Sansa ) + TABLE[rule(--COLS + x)][( dog )] / 22)]){ if(480.7517){ -( -0.58 ); Ygritte -= mislead(Jon); if(Sansa){ } } } } else { dog -= y / betray(dog); if(rule(( COLS ) - TABLE[Sansa][-ROWS],TABLE[1][0.19]) * protect()){ rule(COLS) } else { Stark; if(COLS){ if(Jon){ --0.26 - ( ( y ) ); Arya -= destroy(( ( -( 690.552 ) ) )) } }; Jon /= 96 } } }; dog += ROWS } } }
2019-07-12 16:57
Yeah, the last season sucked
2019-07-12 18:24
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