Question

Pls see attached file

Answer 1

a) Express BA in terms of a and b
b) Given than BX=mBA, show that OX=ma(1-m)b
c) Given that OP=4a and PQ=2b. express OQ in terms of a and b.
d) Given that OX= nOQ use the results for OX and OQ to find the values of m and n...

Answer 2

is it hard @Hero

Answer 3

Not really, but you failed to mention that we were working with vectors here.

Answer 4

oh ...sorry

Answer 5

can u hlp?

Answer 6

I know you're excited, but hang on buddy. Either I will help, or someone else will.

Answer 7

hm okay...

Answer 8

a) b - a

Sorry. I haven't worked with these in a while so it takes longer to figure out

Answer 9

For b) what does m mean?

Answer 10

constant?

Answer 11

Is that a guess?

Answer 12

Can you multiply two vectors?

Answer 13

nope..im sure its a constant

Answer 14

My sources tell me that we are multiplying vectors for part b) which is not possible. It is possible to multiply scalars but not vectors. Do you have anything to add or suggest for part b ?

Answer 15

BX=mBA
BX= m(a-b)
BX=ma-mb
OX=OB+BX
=b+ma-mb
OX=b(1-m)+ma
this is ok d) is the case

Answer 16

for b) originally you wrote that we had to show that show that OX=ma(1-m)b

Now you post a solution that shows that OX=b(1-m)+ma

Answer 17

c) 4a + 2b

Answer 18

You should be able to figure out d) from there

Answer 19

nope its dfclt try nd c

Answer 20

OX = ma + (1 - m)b
OX = nOQ
OQ = 4a + 2b
OX = n(4a + 2b)

OX = OX
n(4a + 2b) = ma + (1 - m)b
(4n)a + (2n)b = (m)a + (1 - m)b

This implies that

4a = m
2n = 1 - m

Therefore

m = 4a
n = (1-m)/2

n = (1 - 4a)/2

That's about as far as I can get you

Answer 21

yeah wait check http://openstudy.com/users/thushananth01#/updates/4f8afb3be4b09e61bffc500a this

Answer 22

hero?

Answer 23

did u like erase it @emcrazy14

Answer 24

(d) OX=nOQ
ma-mb+b=2nb+4an
Equating both sides; ma=4an
m=4n
..
-mb+b+2nb
b(1-m)=2nb
(b is cancelled)
1-4n=2n
n=1/6
Replacing in m=4n, you get m=4/6 or 2/3

Answer 25

absolutely

Answer 26

* -mb+b=2nb
I put addition sign there.

Answer 27

okay now why cnt v frst solve for n and then m?

Answer 28

Do it whatever way you find easy.

Answer 29

i get n = m/4
check ma method
ma-b(1-m)=n(4a+2b)
m=4n
n=m/4
okai fine i get it...

Answer 30

i hve one more? please

Answer 31

Ok. Post it.

Answer 32

i posted chck it