If the family of lines ax+by+c=0 satisfying the condition that a,b,c are in A.P then find the point of concurrency.

+1 vote
32 views
asked Nov 27, 2016 in Mathematics by Rahul Roy (7,895 points) 33 108 285

1 Answer

+1 vote
answered Nov 28, 2016 by Abhishek Kumar (14,593 points) 5 9 35
selected Dec 20, 2016 by sarthaks
 
Best answer

If a,b,c are in A.P then

a+c=2b

=> a−2b+c=0

=> ax+by+c=0

it passes through (1,−2)

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
~~~*****~~~

...