Question 12 - Practice Questions CBSE - Maths Class 12 (2023 Boards) - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards
Last updated at April 16, 2024 by Teachoo
The position vectors of the vertices P,Q and R of ∆PQR are -i ̂+2j ̂+4k ̂, 3i ̂+6j ̂+8k ̂ and 4i ̂+j ̂+k ̂ respectively.
Which of the following is the vector that represents the median (PS) ?
A. 7/2 i ̂+9/2 j ̂+9/2 k ̂
B. 2i ̂+3j ̂+13/3 k ̂
C. 9/2 i ̂+3/2 j ̂+1/2 k ̂
D. -1/2 i ̂+5/2 j ̂+7/2 k ̂
Transcript
The position vectors of the vertices P,Q and R of ∆𝑃𝑄𝑅 are −𝑖 ̂+2𝑗 ̂+4𝑘 ̂, 3𝑖 ̂+6𝑗 ̂+8𝑘 ̂ and 4𝑖 ̂+𝑗 ̂+𝑘 ̂ respectively. Which of the following is the vector that represents the median (𝑃𝑆) ⃗ ? A. 7/2 𝑖 ̂+9/2 𝑗 ̂+9/2 𝑘 ̂ B. 2𝑖 ̂+3𝑗 ̂+13/3 𝑘 ̂ C. 9/2 𝑖 ̂+3/2 𝑗 ̂+1/2 𝑘 ̂ D. −1/2 𝑖 ̂+5/2 𝑗 ̂+7/2 𝑘 ̂
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, Social Science, Physics, Chemistry, Computer Science at Teachoo.
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