Join Sarthaks eConnect Today - Largest Online Education Community!
0 votes
asked in Mathematics by (71.6k points)

Let vector a = i – j, b =  i +  j +  k  and vector c  be a vector such that a x c + b = 0 and a · c = 4 , then |c|2 is equal to :

(1)  9

(2)  8

(3)  17/2

(4)  19/2

1 Answer

+1 vote
answered by (67.6k points)
selected by
Best answer

Correct option  (4)  19/2


Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

One Thought Forever

“There is a close connection between getting up in the world and getting up in the morning.“
– Anon