A) 3
B) 2
C) 1
D) 0
Correct Answer: A
Solution :
If \[A\bot B,\] then \[A.B=0\] \[{{a}^{2}}-2a-3=0\] \[\Rightarrow \] \[(a+1)\,(a-3)=0\] \[\Rightarrow \] \[a=-1\] or \[=3\] [Since magnitude cannot be (negative)]You need to login to perform this action.
You will be redirected in
3 sec