MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
pallavi pradeep bhardwaj Grade: 12
        

a,b,c are three non zero vectors no two of which are collinear If the collinear .If the vectors a+2b is the collinear with c and b+3c is collinear with a,a+2b+6c is equal to

7 years ago

Answers : (2)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear pallavi


let a+2 b = u c  ............1


and   b+3c =va ............2


put replace vctor a from 1 and b


 b+3c =v(uc-2b)


or  (1+2v)b=(uv-3)c


since b and c are not colinier so


 1+2v =0   or v=-1/2


and uv-3=0   or u=-6


put value of u in equation 1


a+2b=-6c


a+2b+6c=0


Please feel free to post as many doubts on our discussion forum as you can.
 If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
 We are all IITians and here to help you in your IIT JEE  & AIEEE preparation.


 All the best.
 
Regards,
Askiitians Experts
Badiuddin

7 years ago
Viraj Jorapur
16 Points
										Let a+2b=kc

b+3c=qa

From the first equation, we get, b=(kc-a)/2
Substituting in the other equation, we get
(k+6)c=(2q+1)a
But as these vectors are not collinear, so the L.H.S. and R.H.S. must be equal to zero independently.

So we get (k+6)=0
k=-6
So a+2b= -6c
a+2b+6c=0
7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,000 off
USE CODE: CART20
  • Statistics and Probability
  • OFFERED PRICE: R 600
  • View Details
Get extra R 120 off
USE CODE: CART20

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details