MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade:
        
if a and b are two vectors such that |a vector+b vector|=root 29 and a vector cros(2i^+4j^+4k^)=(2i^+4j^+4k^)cross b vector then find the value of (a vector+b vector).(-7i^+2j^+3k^)
10 days ago

Answers : (1)

Arun
16138 Points
							
Dear student
 
a x (2, 4, 4) + b x (2,4, 4) = 0
 
Or we can write
 
(a+b )  x (2 i + 4j + 4k) = 0
 
Hence
 
a + b = p( 2i + 4j + 4k)
 
Now
 
As |a +b| = sqrt (29)
 
4p² + 16p² + 16p² = 29
 
p² = 29/36
 
Hence
 
p = sqrt(29) /6
 
Now
 
You can calulate the further question.
10 days ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Get Extra Rs. 1,590 off

COUPON CODE: SELF10


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 19 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Get Extra Rs. 64 off

COUPON CODE: SELF10

Ask Experts

Have any Question? Ask Experts

Post Question

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