Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Please Solve R.D.Sharma class 12 Chapter 23 Scaler or Dot Products Exercise 23.1 Question 30 sub Question 2 Maths Textbook Solution.

Please Solve R.D.Sharma class 12 Chapter 23 Scaler or Dot Products  Exercise 23.1 Question 30 sub Question 2 Maths Textbook Solution.

Answers (1)

Answer:  \sqrt{13}

Hint:  You must know the rules of solving vectors.

Given:   \left ( \vec{x}-\vec{a} \right ).\left ( \vec{x}+\vec{a} \right )=12

Solution: Given that  \mid \vec{a}\mid =1 unit vector

                                                        \mid \vec{a}\mid =1

\begin{aligned} &(\vec{x}-\vec{a}) \cdot(\vec{x}+\vec{a})=12 \\ &|\vec{x}|^{2}-|\vec{a}|^{2}=12 \\ &|\vec{x}|^{2}-1^{2}=12 \\ &|\vec{x}|^{2}=13 \\ &|\vec{x}|=\sqrt{13} \end{aligned}

Posted by

infoexpert21

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE Class 12 Geography Paper Analysis: Easy to moderate in difficulty, map-based, MCQ questions manageable
anam-khan

CBSE Class 12 Board Exam 2026 LIVE: 12th Geography paper ends; set 1, 2 answer key, analysis
anam-khan

‘More exhausting than manual’: How CBSE on-screen marking system is draining teachers it was meant to help

Latest Question