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: 12
        
the point (a+1,1)  , (2a+1,3) and (2a+2,2a) are collinear, if:
(A)a= -1,2
(B)a= ½,2
(C)a= 2,1
(D)a= -½,2
4 years ago

Answers : (1)

Latika Leekha
askIITians Faculty
165 Points
							Hello student,
The points (a+1,1) , (2a+1,3) and (2a+2, 2a) are collinear if
\begin{vmatrix} a+1 & 1&1 \\ 2a+1& 3& 1\\ 2a+2&2a &1 \end{vmatrix} = 0
By solving this we get,
(a + 1)(3 - 2a) – 1(2a + 1 – 2a – 2) + (4a2 + 2a – 6a – 6) = 0
2a2 - 3a – 2 = 0
This gives 2a (a – 2) + 1(a - 2) = 0
a = -1/2, 2.
4 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


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

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


Ask Experts

Have any Question? Ask Experts

Post Question

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