Join Sarthaks eConnect Today - Largest Online Education Community!
0 votes
asked in Mathematics by (67.9k points)

Let vector a = i + j + √2k, vector b = b1i + b2j + √2k and vector c = 5i + j + √2k be three vectors such that the projection vector of vector b on vector a is vector a. If vector a + vector b  is perpendicular to vector c, then |vector b| is equal to : 

(1) √32 

(2) 6 

(3) √22 

(4) 4

1 Answer

+1 vote
answered by (69.7k points)
selected by
Best answer

The correct option (2) 6   


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