Practice Questions CBSE - Maths Class 12 (2023 Boards)

CBSE Class 12 Sample Paper for 2022 Boards (For Term 2) →
Class 12
Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Question 15 - Practice Questions CBSE - Maths Class 12 (2023 Boards) - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at Dec. 13, 2024 by

(PQ) is perpendicular to (QR) . The position vectors of P, Q and R are (4i ̂+7j ̂-k ̂), (5i ̂+yj ̂+k ̂ ) and (-2i ̂+9j ̂+4k ̂ ) respectively.

What is the value of y?

A. -9

B. -8

C. 7

D. 8

 

Slide15.JPG

Go Ad-free

Transcript

(𝑷𝑸) ⃗ is perpendicular to (𝑄𝑅) ⃗. The position vectors of P, Q and R are (4𝑖 ̂+7𝑗 ̂−𝑘 ̂), (5𝑖 ̂+𝑦𝑗 ̂+𝑘 ̂ ) and (−2𝑖 ̂+9𝑗 ̂+4𝑘 ̂ ) respectively. What is the value of y? A. -9 B. -8 C. 7 D. 8

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo