Home » Ask & Discuss » Mathematics. » Vectors « Back to Discussion

Vectors

New kid on the Block

Joined:	22 Mar 2008
Post:	22

27 Mar 2008 12:30:06 IST

0 People liked this

862

if a b c are 3 vectors such that (b.c).a=(a.b).c . what does this imply?

None

if a b c are 3 vectors such that (b.c).a=(a.b).c . what does this imply?

Share this article on:

Comments (18)

layman

Hot goIITian

Joined: 15 Mar 2008

Posts: 137

27 Mar 2008 12:31:51 IST

Like 0 people liked this

Associative and commutative laws holds good.

shridhar ramachandran

Scorching goIITian

Joined: 30 Jan 2008

Posts: 203

27 Mar 2008 12:32:12 IST

Like 0 people liked this

it doesnt imply anything. this is just a combination of associative law and commutative law for dot droduct of vectors, which is ALWAYS true..

so a,b,c can be any 3 vectors..

layman

Hot goIITian

Joined: 15 Mar 2008

Posts: 137

27 Mar 2008 12:35:40 IST

Like 0 people liked this

Hey shrids that's what I meant.

KEERTHI KUNDANA

New kid on the Block

Joined: 2 May 2007

Posts: 28

27 Mar 2008 12:39:07 IST

Like 2 people liked this

the associative law for dot product does not exist
as b.c would be a scalar(d) and the dot product of a scalar with a vector is not defined
thus d.a is not defined

KEERTHI KUNDANA

New kid on the Block

Joined: 2 May 2007

Posts: 28

27 Mar 2008 12:40:28 IST

Like 0 people liked this

correct me if i'm wrong!

layman

Hot goIITian

Joined: 15 Mar 2008

Posts: 137

27 Mar 2008 12:42:28 IST

Like 0 people liked this

Yes correct.

BILLA

Blazing goIITian

Joined: 14 Mar 2008

Posts: 447

27 Mar 2008 15:03:57 IST

Like 0 people liked this

how can (b.c).a even exist or be a legal expression???the statement is wrong!!!!

varsha valli g.

Blazing goIITian

Joined: 31 Jan 2007

Posts: 515

27 Mar 2008 17:20:58 IST

Like 0 people liked this

yes how can u have a dot product between a scalar and a vector,its just normal multipication.
!!!!!!!!!!!

Ashwini

Blazing goIITian

Joined: 4 Nov 2007

Posts: 1524

27 Mar 2008 19:12:58 IST

Like 0 people liked this

but even if it is normal multiplication, can it exist??

gokul subramanian

Blazing goIITian

Joined: 28 Jan 2008

Posts: 1451

27 Mar 2008 19:21:04 IST

Like 0 people liked this

in vectors there are 2 multiplications '.' and 'x'
wat do u mean by 'normal' multiplication???
pls make ur question clear

Gaurav |spideyunlimited| Ragtah

Moderator

Joined: 16 Dec 2006

Posts: 3373

27 Mar 2008 19:28:51 IST

Like 0 people liked this

i think she means n times magnitude into a vector.
a vector
3a vector etc.
jus telling u wht i think she meant

anand bhanushali

Blazing goIITian

Joined: 2 Jan 2008

Posts: 504

27 Mar 2008 20:08:11 IST

Like 0 people liked this

(a.b).c =(abcosQ).c=abcosQ ccosQ'
so why all are saying it does not exist

correct me if i m wrong or rate me if useful

gokul subramanian

Blazing goIITian

Joined: 28 Jan 2008

Posts: 1451

27 Mar 2008 20:13:44 IST

Like 0 people liked this

a.b is a scalar..
dot product of 2 vectors is a scalar
u cannot take the 2nd dot pdt as it will then amt to dot pdt between a scalar and a vector

siddharth raghuraman

Cool goIITian

Joined: 28 Dec 2007

Posts: 76

27 Mar 2008 20:16:02 IST

Like 0 people liked this

@bhartibhanushali

abcosQ has no direction...so u cannot dot it with a vector...

the question has no meaning...

Umang

Blazing goIITian

Joined: 12 Dec 2006

Posts: 926

27 Mar 2008 20:40:55 IST

Like 0 people liked this

i agree with keeru !
initially all did the silly mistake but keeru was there to correct it !

/-\|\|(|-|/-\|_

Scorching goIITian

Joined: 11 Mar 2007

Posts: 268

29 Mar 2008 05:09:34 IST

Like 0 people liked this

IT MEANS C=A

gaurav

New kid on the Block

Joined: 22 Mar 2008

Posts: 22

31 Mar 2008 16:28:42 IST

Like 0 people liked this

ok ok

pink_ele

Blazing goIITian

Joined: 16 Jan 2007

Posts: 1836

31 Mar 2008 16:47:48 IST

Like 0 people liked this

its a meaning less term dear
dot product of a vector wid a scalar has no meaning!!!!!!!!!!!!!!!!!!!!!!!!

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team