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 22 Algbra of Vectors Exercise 22.3 Question 1 Maths textbook Solution.

Please Solve R.D.Sharma class 12 Chapter 22 Algbra of Vectors  Exercise 22.3 Question 1 Maths textbook Solution.

Answers (1)

Answer:

\frac{5}{3}\vec{a},3\vec{a}+4\vec{b}

Hint: if a point R divides a line PQ into m:n internally then point P=\frac{m\vec{OR+n\vec{OP}}}{m-n}and externally then point R=\frac{m\vec{OQ+n\vec{OP}}}{m-n}

Given:

\vec{OP}=2\vec{a}+\vec{b}

\vec{OQ}=\vec{a}-2\vec{b}

Solution:

(i) \overrightarrow{O R}( internally )

=\frac{1(\vec{a}-2 \vec{b})+2(2 \vec{a}+\vec{b})}{1+2}

=\frac{\vec{a}-2 \vec{b}+4 \vec{a}+2 \vec{b}}{3}

=\frac{5 \vec{a}}{3}

(ii) \overrightarrow{O R}( Externally )

=\frac{1(\vec{a}-2 \vec{b})-2(2 \vec{a}+\vec{b})}{1-2}

=\frac{\vec{a}-2 \vec{b}-4 \vec{b}-2 \vec{b}}{-1}

=\frac{-3 \vec{a}-4 \vec{b}}{-1}

=3 \vec{a}+4 \vec{b}

 

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 date sheet 2025 for Classes 10, 12 likely in November last week: Reports
anam-khan

CBSE allows Class 10, 12 students from disaffiliated schools to appear for board exam 2025 from same school
anam-khan

CBSE withdraws affiliation of 21 schools, downgrades 6 schools in two states; most in Delhi

Latest Question